suunto cobra - Malibu Scuba Repair

suunto cobra - Malibu Scuba Repair
EN
SUUNTO
COBRA
USER’S GUIDE
Scroll Button
Indicators
Cylinder Pressure
Temperature
Week Day
Mode Text
Personal Adjustment Mode
Altitude Adjustment Mode
DIVE TIME
Daily/DiveTime/Depth Alarm
On Indicator
Dive Time
Time
Month,Day
Low Battery Warning
Smart Button
Indicators
The Smart Button:
- Activation
- Backlight
- Mode Operations
Current Time Display
Surface Interval Time
No Flying Time
No-Decompression Time
Total Ascent Time
Safety Stop Time
Bar Graph:
- Ascent Rate Indicator
- Battery Power Indicator
- Logbook Page Indicator
Fast Ascent Warning
(SLOW)
Maximum Depth
Ceiling Depth on Decompression Stop
Mandatory Safety Stop Depth
Average Depth in Logbook
Oxygen Partial Pressure
AM/PM Indicator
Safety Stop Warning
Safety Stop Indicator
Time (alternative display) Button
Scroll Button (decrease value, descend)
psi
OPTIONS
Plan Button
Scroll Button (increase value, ascend)
OLF
C
B
T °F °Cbar
NO DEC TIME
OK
SELECT
Remaining Air Time /
Oxygen Percentage in Nitrox Mode
AIR TIME
CEILING
S
L
O
AVGPO2 MAX W
STOP ASC TIME
QUIT
m ft
NO O2%SURF
DIVE
Do Not Fly Icon
Bar Graph:
- Mode Indicator
- Consumed Bottom Time
- Oxygen Limit Fraction
Diver Attention Symbol
Bookmark Symbol
Present Depth Dive Counter
Arrows:
- Decompression Stop at the Ceiling Depth
- Mandatory Safety Stop Zone
- Ascent Recommended
- Must Descend
Quick Reference Guide
DEFINITION OF WARNINGS, CAUTIONS AND NOTES
Throughout this manual, special references are made when deemed important. Three
classifications are used to separate these references by their order of importance.
WARNING
CAUTION
NOTE
is used in connection with a procedure or situation that
may result in serious injury or death.
is used in connection with a procedure or situation that
will result in damage to the product.
is used to emphasize important information.
COPYRIGHT, TRADEMARK AND PATENT NOTICE
This instruction manual is copyrighted and all rights are reserved. It may not, in whole
or in part, be copied, photocopied, reproduced, translated, or reduced to any media
without prior written consent from SUUNTO.
SUUNTO, COBRA, Consumed Bottom Time (CBT), Oxygen Limit Fraction (OLF),
SUUNTO Reduced Gradient Bubble Model (RGBM), Continuous Decompression
and their logos are all registered or unregistered trademarks of SUUNTO. All rights
are reserved.
Patents have been issued or applied for one or several features of this product.
CE
The CE mark is used to mark conformity with the European Union EMC
directive 89/336/EEC. The SUUNTO dive instruments fulfill all the required EU
directives.
FIOH, Laajaniityntie 1, FIN-01620 Vantaa, Finland, notified body no.0430, has
EC type-examined this type of personal protective equipment.
EN 250 Respiratory equipment - Open circuit self-contained compressed air diving
apparatus - Requirements, testing, marking.
The tank pressure gauge and the parts of this product used in measuring the tank
pressure meet the requirements set in the section of the European Standard EN 250
that concern tank pressure measurements. The instruments must be serviced by an
authorized dealer every second year or after 200 dives (whichever comes first).
PrEN 13319
PrEN 13319 “Diving accessories - Depth gauges and combined depth and time
measuring devices - Functional and safety requirements, test methods” is a
European diving depth gauge standard draft. The COBRA is designed to comply
with this draft standard.
ISO 9001
SUUNTO Oyj’s Quality Assurance System is certified by Det Norske Veritas to be
according to the ISO 9001 in all SUUNTO Oyj’s operations (Quality Certificate No.
96-HEL-AQ-220).
1
WARNINGS
SUUNTO Oyj does not assume any responsibility for losses or claims by third
parties, which may arise through the use of this device.
Due to continuous product development, the COBRA is subject to change without
notice.
WARNING!
READ THIS MANUAL! Carefully read this instruction manual in its entirety
paying close attention to all warnings listed below, including section 1.1. “Safety
Precautions”. Make sure that you fully understand the use, displays and limitations
of the dive computer because any confusion resulting from neglecting to follow
this instruction manual or from improper use of this device may cause a diver to
commit errors that may lead to serious injury or death.
WARNING!
NOT FOR PROFESSIONAL USE! Suunto dive computers are intended for
recreational use only. The demands of commercial or professional diving
may expose the diver to depths and exposures that tend to increase the risk of
decompression illness (DCI). Therefore, Suunto strongly recommends that the
device be not used for commercial or professional diving activity.
WARNING!
ONLY DIVERS TRAINED IN THE PROPER USE OF SCUBA DIVING
EQUIPMENT SHOULD USE A DIVE COMPUTER! No dive computer can
replace the need for proper dive training. Insufficient or improper training may
cause diver to commit errors that may lead to serious injury or death.
WARNING!
THERE IS ALWAYS A RISK OF DECOMPRESSION ILLNESS (DCI) FOR ANY
DIVE PROFILE EVEN IF YOU FOLLOW THE DIVE PLAN PRESCRIBED
BY DIVE TABLES OR A DIVE COMPUTER. NO PROCEDURE, DIVE
COMPUTER OR DIVE TABLE WILL PREVENT THE POSSIBILITY OF DCI
OR OXYGEN TOXICITY! An individual’s physiological make up can vary from
day to day. The dive computer cannot account for these variations. You are strongly
advised to remain well within the exposure limits provided by the instrument to
minimize the risk of DCI. As an added measure of safety, you should consult a
physician regarding your fitness before diving.
2
WARNING!
SUUNTO STRONGLY RECOMMENDS THAT SPORT DIVERS LIMIT THEIR
MAXIMUM DEPTH TO 40 M [130 FT] OR TO THE DEPTH CALCULATED
BY THE COMPUTER BASED ON THE SELECTED O2% AND A MAXIMUM
PO2 OF 1.4 BAR SETTINGS!
WARNING!
DIVES WITH REQUIRED DECOMPRESSION STOPS ARE NOT
RECOMMENDED. YOU SHOULD ASCEND AND BEGIN DECOMPRESSION
IMMEDIATELY WHEN THE DIVE COMPUTER SHOWS YOU THAT A
DECOMPRESSION STOP IS REQUIRED! Note the blinking ASC TIME symbol
and the upward pointing arrow.
WARNING!
USE BACK-UP INSTRUMENTS! Make sure that you use back-up instrumentation
including a depth gauge, submersible pressure gauge, timer or watch, and have
access to decompression tables whenever diving with the dive computer.
WARNING!
PERFORM PRECHECKS! Always activate and check the device before diving
in order to ensure that all Liquid Crystal Display (LCD) segments are completely
displayed, that the device has not run out of battery power, and that the oxygen,
altitude and personal adjustments are correct. Also, exit the Data Transfer mode
before diving, as the computer does not automatically revert to Dive mode from
Data Transfer mode.
WARNING!
YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COMPUTER
COUNTS DOWN THE NO-FLYING TIME. ALWAYS ACTIVATE THE
COMPUTER TO CHECK THE REMAINING NO-FLY TIME PRIOR TO
FLYING! The computer goes into the stand-by display automatically 5 minutes
after the dive has ended. The stand-by display shuts off after two hours. Flying
or traveling to a higher altitude within no-fly time can greatly increase the risk
of DCI. Review the recommendations given by Diver’s Alert Network (DAN) in
chapter 3.6.3. “Flying After Diving”. There can never be a flying after diving rule
that is guaranteed to completely prevent decompression illness!
3
WARNING!
THE DIVE COMPUTER SHOULD NEVER BE TRADED OR SHARED
BETWEEN USERS WHILE IT IS IN OPERATION! Its information will not
apply to someone who has not been wearing it throughout a dive or sequence of
repetitive dives. Its dive profiles must match that of the user. If it is left on the
surface during any dive, it will give inaccurate information for subsequent dives.
No dive computer can take into account dives made without the computer. Thus
any diving activity up to four days prior to initial use of the computer may cause
misleading information and must be avoided.
WARNING!
DO NOT EXPOSE THE COBRA DIVE COMPUTER WITH IT´S STANDARD
HOSE TO ANY GAS MIX CONTAINING MORE THAN 40% OXYGEN!
Enriched air with greater oxygen content presents a risk of fire or explosion and
serious injury or death.
WARNING!
DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU HAVE NOT
PERSONALLY VERIFIED ITS CONTENTS AND ENTERED THE ANALYZED
VALUE INTO YOUR DIVE COMPUTER! Failure to verify cylinder contents and
enter the appropriate O2% into your dive computer will result in incorrect dive
planning information.
WARNING!
THE DIVE COMPUTER WILL NOT ACCEPT FRACTIONAL PERCENTAGE
VALUES OF OXYGEN CONCENTRATION. DO NOT ROUND UP
FRACTIONAL PERCENTAGES! For example, 31.8% oxygen should be entered
as 31%. Rounding up will cause nitrogen percentages to be understated and will
affect decompression calculations. If there is a desire to adjust the computer to
provide more conservative calculations, use the personal adjustment feature to affect
decompression calculations or reduce the PO2 setting to affect oxygen exposure.
WARNING!
SET THE CORRECT ALTITUDE ADJUSTMENT MODE! WHEN DIVING at
altitudes greater than 300 m [1000 ft] the Altitude Adjustment feature must be
correctly selected in order for the computer to calculate the decompression status.
THE DIVE COMPUTER is not intended for use at altitudes greater than 3000
m [10000 ft]. FAILURE TO SELECT the correct Altitude Adjustment setting or
diving above the maximum altitude limit will result in erroneous dive and planning
data.
4
WARNING!
SET THE CORRECT PERSONAL ADJUSTMENT MODE!, Whenever it
is believed that factors that tend to increase the possibility of DCI exist, it is
recommended that you use this option to make the calculations more conservative.
Failure to select the correct Personal Adjustment setting will result in erroneous
dive and planning data.
NOTE!
It is not possible to change between Air, Nitrox and Gauge modes before the
instrument has counted down the no-flying time.
There is one exception to this: You can change from Air to Nitrox mode even
during the no-flying time. When planning both air and nitrox dives during the
same dive series, you should set the instrument in Nitrox mode and modify the
gas mix accordingly.
In Gauge mode, the no-flying time is always 48 hours.
5
TABLE OF CONTENTS
WARNINGS .................................................................................... 1
1. INTRODUCTION ....................................................................... 8
1.1. SAFETY PRECAUTIONS ......................................................................... 9
1.1.1. Emergency Ascents ....................................................................9
1.1.2. Dive Computer Limitations .......................................................9
1.1.3. Nitrox .......................................................................................10
2. GETTING ACQUAINTED ........................................................ 11
2.1. FUNCTIONS ............................................................................................11
2.2. CONNECTING THE COBRA TO A REGULATOR ..............................11
2.3. PUSH BUTTONS ....................................................................................12
2.4. WATER CONTACTS ...............................................................................13
3. DIVING WITH THE COBRA................................................... 14
3.1. BEFORE DIVING ....................................................................................14
6
3.1.1. Activation and Prechecks .........................................................14
3.1.2. Battery Power Indicator and Low Battery Warning .................15
3.1.3. Dive Planning [PLAN] ............................................................16
3.1.4. User Definable Functions and Alarms .....................................17
3.2. SAFETY STOPS ......................................................................................18
3.2.1. Recommended Safety Stop ......................................................18
3.2.2. Mandatory Safety Stop ............................................................18
3.3. DIVING IN AIR MODE ..........................................................................20
3.3.1. Basic Dive Data .......................................................................20
3.3.2. Bookmark.................................................................................21
3.3.3. Cylinder Pressure Data ............................................................21
3.3.4. Consumed Bottom Time (CBT) ...............................................23
3.3.5. Ascent Rate Indicator ...............................................................23
3.3.6. Decompression dives ...............................................................24
3.4. DIVING IN NITROX MODE ..................................................................28
3.4.1. Before Diving...........................................................................28
3.4.2. Oxygen Displays ......................................................................29
3.4.3. Oxygen Limit Fraction (OLF) .................................................30
3.5. DIVING IN GAUGE MODE ...................................................................31
3.6. AT THE SURFACE ..................................................................................32
3.6.1. Surface Interval ........................................................................32
3.6.2. Dive Numbering.......................................................................33
3.6.3. Flying After Diving ..................................................................34
3.7. AUDIBLE AND VISUAL ALARMS ................................................35
3.8. HIGH ALTITUDE DIVES AND PERSONAL ADJUSTMENT ......37
3.8.1. Altitude Adjustment .................................................................37
3.8.2. Personal Adjustment ................................................................38
3.9. ERROR CONDITIONS ...........................................................................39
4. MENU BASED MODES ........................................................... 40
4.1. MEMORIES AND DATA TRANSFER [1 MEMORY] ...........................42
4.1.1. Logbook and Dive Profile Memory [1 LOGBOOK] ...............42
4.1.2. Dive History Memory [2 HISTORY].......................................45
4.1.3. Data Transfer and PC-Interface [3 TR-PC]..............................45
4.2. SIMULATION MODE [2 SIMUL]..........................................................47
4.2.1. Dive Simulator [1 SIMDIVE] ..................................................47
4.2.2. Dive Planning Simulator [2 SIMPLAN]..................................48
4.3. SET MODES [3 SET] ..............................................................................49
4.3.1. Dive Parameter Settings [1 SET DIVE] ..................................49
4.3.1.1. Altitude Adjustment and Personal Adjustment Settings
[1 AdJ MODE] ........................................................................49
4.3.1.2. Dive Time Alarm Setting [2 d ALARM]....................50
4.3.1.3. Maximum Depth Alarm Setting [3 MAX DPTH] .....50
4.3.1.4. Nitrox/Oxygen Settings [4 NITROX] ........................50
4.3.2. Setting Time [2 SET TIME].....................................................51
4.3.2.1. Adjusting Time [1 AdJ TIME]....................................51
4.3.2.2. Adjusting Date [2 AdJ DATE]....................................51
4.3.2.3. Adjusting Daily Alarm [3 T ALARM] .......................51
4.3.3. Setting Preferences [3 SET PREF] ..........................................52
4.3.3.1. Backlight Setting [1 LIGHT] .....................................52
4.3.3.2. Dive Computer Units Setting [2 UNITS]...................52
4.3.3.3. Dive Computer Model Setting [3 MODEL] AIR/NITROX/GAUGE ..............................................52
5. CARE AND MAINTENANCE ................................................. 53
5.1. IMPORTANT INFORMATION ...............................................................53
5.2. CARE OF YOUR DIVE COMPUTER.....................................................54
5.3. MAINTENANCE .....................................................................................55
5.4. WATER RESISTANCE INSPECTION ....................................................55
5.5. BATTERY REPLACEMENT ...................................................................55
5.6. DISPLAY SHIELD REPLACEMENT .....................................................59
5.7. COMPASS ATTACHMENT .....................................................................59
6. TECHNICAL DESCRIPTION .................................................. 60
6.1. OPERATING PRINCIPLES.....................................................................60
6.2. REDUCED GRADIENT BUBBLE MODEL, SUUNTO RGBM ...........62
6.3. OXYGEN EXPOSURE ............................................................................63
6.4. TECHNICAL SPECIFICATION ..............................................................64
7. WARRANTY ............................................................................. 67
8. GLOSSARY ............................................................................... 68
7
1. INTRODUCTION
Congratulations on your purchase of the SUUNTO COBRA advanced dive
computer. The Cobra builds on the Suunto tradition of delivering feature-rich
dive computers. The Cobra provides many new and enhanced features that cannot
be found in any other air-integrated dive computer. Push button controls access
a wide selection of choices. The display is optimized for the dive mode chosen.
This air-integrated dive computer is a compact and sophisticated multipurpose dive
instrument, designed to give you years of trouble-free service.
CHOICE OF OPERATING MODES AND SET-UP OPTIONS
User options for the Cobra are selected using the push buttons. Pre Dive
configuration and setup options include:
•
•
•
•
•
•
•
•
•
•
Choice of operating mode - Air / Nitrox / Gauge
Choice of unit - Metric / Imperial
Maximum depth alarm
Dive time alarm
Backlight settings
Clock, calendar, daily alarm
Mix Oxygen fraction % (Nitrox mode only)
Maximum PO2 (Nitrox mode only)
Altitude adjustment
Personal adjustment
CONTINUOUS DECOMPRESSION WITH SUUNTO RGBM
The Suunto Reduced Gradient Bubble Model (RGBM) utilized in the Cobra predicts
both dissolved and free gas in blood and tissues of divers. It is a significant advance
on the classic Haldane models, which do not predict free gas. The advantage of
Suunto RGBM is additional safety through its ability to adapt to a variety of
situations and dive profiles.
In order to optimize how to respond to different added risk situations an additional
category of stop, referred to as a Mandatory Safety Stop, has been introduced. Also
a countdown for the Recommended Safety Stop is included. The combination of
stop types will depend on the specific dive situation.
To get the most from the safety benefits be sure to read the summary of the Suunto
Reduced Gradient Bubble Model on page 62.
8
1.1. SAFETY PRECAUTIONS
Do not attempt to use the dive computer without reading this instruction manual
in its entirety, including all the warnings. Make sure that you fully understand the
use, displays and limitations of the instrument. If you have any questions about
the manual or the dive computer, contact your SUUNTO dealer before diving with
the dive computer.
Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN
SAFETY!
When used properly, the dive computer is an outstanding tool for assisting
properly trained, certified divers in planning and executing sport dives. It is NOT
A SUBSTITUTE FOR CERTIFIED SCUBA INSTRUCTION, including training
in the principles of decompression.
Diving with enriched air mixtures (nitrox) exposes the user to risks different from
those associated with diving with standard air. These risks are not obvious and
require training to understand and avoid. Risks include possible serious injury or
death.
Do not attempt to dive with any gas mix other than standard air without first
receiving certified training in this specialty.
1.1.1. EMERGENCY ASCENTS
In the unlikely event that the dive computer malfunctions during a dive, follow
the emergency procedures provided by your certified dive training agency or,
alternatively,
STEP 1: Assess the situation calmly and then move promptly to less than 18 m
[60 ft].
STEP 2: At 18 m [60 ft], slow down your ascent rate to 10 m/min [33 ft/min] and
move to a depth between 3 and 6 meters [10 to 20 ft].
STEP 3: Stay there as long as you assess your air supply will safely allow.
After reaching the surface stay out of the water for at least 24 hours.
1.1.2. DIVE COMPUTER LIMITATIONS
While the dive computer is based on current decompression research and technology,
you must realize that the computer cannot monitor the actual physiological functions
of an individual diver. All decompression schedules currently known to the authors,
including the U.S. Navy Tables, are based on theoretical mathematical models,
which are intended to serve as a guide to reduce the probability of decompression
illness.
9
1.1.3. NITROX
Diving with nitrox provides the diver with an opportunity to reduce the risk of
decompression illness by reducing the nitrogen content in the breathing gas mix.
However, when the gas mix is altered, the oxygen content of the mix is generally
increased. This increase exposes the diver to an oxygen toxicity risk not usually
considered in recreational diving. In order to manage this risk, the dive computer
tracks the time and intensity of the oxygen exposure and provides the diver with
information to adjust the dive plan in order to maintain oxygen exposure within
reasonably safe limits.
In addition to the physiological effects of enriched air on the body there are
operational considerations to be addressed when handling altered breathing mixes.
Elevated concentrations of oxygen present a fire or explosion hazard. Consult with
the manufacturer of your equipment in regards to its compatibility with nitrox.
10
2. GETTING ACQUAINTED
2.1. FUNCTIONS
You can select the dive computer model between the Regular Air Dive Computer,
Nitrox Dive Computer and Depth Gauge with Timer mode.
The COBRA multipurpose dive computer is an air integrated computer featuring
three dive computer modes (AIR, NITROX, GAUGE), three main operating
modes (TIME/STAND-BY, SURFACE, DIVING), three menu based main modes
(MEMORY, SIMULATION, SET) and 16 - 18 menu based submodes (review
separate Quick Reference Guide). You can scroll through the modes using the push
buttons. The mode indicator at the left side and the mode text at the bottom of the
display indicate the selected mode.
The timekeeping display is the default display of the instrument (Fig. 2.1.). If a
button is not pressed within 5 minutes, the dive computer beeps and returns to the
timekeeping display automatically (except in Diving and Simulation modes). The
timekeeping display shuts off after two hours, but pressing the PLAN or TIME
button activates it.
2.2. CONNECTING THE COBRA TO A REGULATOR
Upon purchasing the Cobra, Suunto strongly recommends you have your dealer
attach it to the first stage of your regulator.
If you decide to attach it yourself, follow the steps outlined below:
1.
2.
3.
Remove the high pressure (HP) port plug on the first stage of your
regulator using an appropriate sized wrench.
Thread the high pressure hose of the Cobra into the port of your regulator with your fingers. Tighten the hose fitting with a 16 mm
[5/8”]
wrench. DO NOT OVERTIGHTEN!
Attach the regulator to a charged scuba cylinder. Slowly open the valve.
Check for leaks by submerging the first stage regulator in water. If leaks
are detected, consult your dealer.
11
2.3. PUSH BUTTONS
The dive computer has easy-to-use push buttons and an advisory display, which
guides the user. The SMART (MODE) button is the key to the system. The two
scroll buttons, PLAN and TIME, are used for scrolling up and down the menus
and to show the alternative displays. The dive computer is controlled with these
three push buttons as follows (see Fig. 2.2.).
Press the SMART (MODE) button
•
•
•
•
•
To activate the dive computer.
To change from the Surface Mode to the menu based modes.
To select, confirm or quit a submode (short press).
To immediately exit any submode to the Surface Mode (long press).
To activate the electroluminescent backlight (in the Surface Mode hold
down the mode button for more than two (2) seconds, during a dive for
one (1) second).
Press the arrow up scroll (PLAN) button
•
•
•
•
To activate the timekeeping display, if the display is blank.
To activate the Dive Planning in the Surface Mode.
To make a special bookmark in the profile memory during a dive.
To scroll up the options (s, increase).
Press the arrow down scroll (TIME) button
•
•
•
To activate the timekeeping display, if the display is blank.
To activate the Time display(s) and/or alternative display(s).
To scroll down the options (t, decrease).
The dive computer is controlled with the SMART (MODE/On/Backlight/Select/
OK/Quit) and the PLAN s and TIME t push buttons and with the water contacts
as follows:
Activation
press the SMART (On) button or immerse the instrument in
water for five (5) seconds.
Dive Planning
in the Surface Mode, press the PLAN button.
Menu Modes
press the SMART (MODE) button.
The display is illuminated by holding down the SMART button for more than
two seconds.
12
2.4. WATER CONTACTS
The water contacts control the automatic activation of
the Dive Mode.
The water and data transfer contacts are located on
bottom of the case (Fig 2.3.). When submerged the water
contacts are connected to the push buttons (which are
the other pole of the water contact) by the conductivity
of the water. The “AC” text (Active Contacts, Fig. 2.4.)
will appear on display. The AC text will be shown until
the water contact deactivates or the dive computer enters
the Dive Mode automatically.
Fig. 2.1. Time keeping display.
Pressing PLAN or TIME button
activates display.
The SMART button
B
The PLAN, TIME and
SCROLL buttons
A
Fig. 2.2. Push buttons of the
dive computer.
Fig 2.3. Depth sensor (A), water/data transfer contacts (B).
Fig. 2.4. Active water contacts
are indicated by the text AC.
13
3. DIVING WITH THE COBRA
DIVE
m ft
NO O2%SURF
CEILING
S
L
O
AVGPO2 MAX W
STOP ASC TIME
QUIT
OK
AIR TIME
OLF
C
B
T °F °C bar
SELECT
NO DEC TIME
psi
OPTIONS
DIVE TIME
This section contains instructions on how to operate the
dive computer and interpret its displays. You will find
that this dive computer is easy to use and read. Each
display shows only the data relevant to that specific
diving situation.
3.1 BEFORE DIVING
Fig. 3.1. Startup I. All segments
shown.
a
OK
b
3.1.1. ACTIVATION AND PRECHECKS
The dive computer will activate if submerged deeper
than 0.5 m (1.5 ft). However, it is necessary to turn
on the Dive Mode before diving to check the cylinder
pressure, altitude and personal adjustment settings,
battery condition, oxygen settings etc. Press the SMART
(On) button to activate the instrument.
After activation all display elements will turn on showing
mostly figure 8’s and graphical elements (Fig. 3.1.). A
few seconds later the battery power indicator is shown
and the backlight and the buzzer are activated (Fig. 3.2.
display a, b, c or d depending on the battery voltage). If
set to Air mode the screen will enter the Surface mode
(Fig. 3.3.). If set to Gauge mode the text GAUGE is
shown (Fig. 3.4.) and if set to Nitrox mode the essential
oxygen parameters are shown with the text NITROX
(Fig. 3.21.) before the Surface mode.
At this time, perform your precheck making sure that:
•
c
•
•
d
QUIT
•
•
•
Fig. 3.2. Startup II. Battery
power indicator.
14
the instrument operates in the correct mode
and provides a complete display (Air and
Nitrox modes)
the low battery indicator is not on
the altitude and personal adjustment settings
are correct
the instrument displays correct units of
measurement (Metric/Imperial)
the instrument displays correct temperature
and depth (0.0 m [0 ft])
the buzzer beeps
•
you have enough air for your planned dive. You should also check the
pressure reading against your back-up pressure gauge.
And if set to Nitrox mode, make sure that:
•
•
the oxygen percentage is adjusted according to the measured Nitrox
blend in your cylinder
the oxygen partial pressure limit is set correctly.
The dive computer is now ready for diving.
3.1.2. BATTERY POWER INDICATOR AND LOW BATTERY
WARNING
This dive computer has a unique graphic Battery Power Indicator designed to give
you an advance notice of impending need to change the battery.
The Battery Power Indicator can always be seen when the Dive Mode is activated.
The electroluminescent backlight will be on during the battery check. The following
Table and Figure show the various warning levels.
TABLE 3.1. BATTERY POWER INDICATOR
15
Temperature or an internal oxidation of the battery
affects the battery voltage. If the instrument is stored
for a long period, the low battery warning may be
displayed even though the battery has enough capacity.
The low battery warning may also be displayed at low
temperatures, even though the battery has enough
capacity in warmer conditions. In these cases repeat the
battery check procedure.
m
bar
DIVE TIME
TIME
°C
After battery check the Low Battery Warning is indicated
by the battery symbol (Fig. 3.5.).
Fig 3.3. Startup III. Surface
mode. Depth and dive time are
zero and cylinder pressure is
300 bar [4350 psi]. Pressing
TIME button activates alternative display of temperature and
current time.
If the battery symbol is displayed in the Surface mode
or if the display is faded or weak, the battery may be too
low to operate the dive computer and battery replacement
is recommended.
NOTE! For safety reasons the backlight cannot be
activated when the low battery warning is indicated
by the battery symbol.
m
3.1.3. DIVE PLANNING [PLAN]
bar
DIVE TIME
TIM
°C
Fig. 3.4. Startup IV. Gauge
mode.
To enter Planning Mode, press the PLAN button at
any time during Surface Mode. After showing the
text “PLAN” (Fig. 3.6.), the display will show the nodecompression limit for the depth of 9 m [30 ft]. By
pressing the down arrow (t) TIME button, the dive
computer will calculate and show the next deeper nodecompression limits in 3 m [10 ft] increments ending
at 45 m [150 ft]. By pressing the up arrow (s) PLAN
button, the next shallower depth will be shown again.
The Planning Mode is cancelled by pressing the SMART
(QUIT) button.
m
bar
NOTE! The Planning mode is disabled in Gauge
mode and in Error mode (see section 3.9. “Error
Conditions”).
DIVE TIME
Fig. 3.5. Low Battery Warning.
Battery symbol indicates that
the battery is low and battery
replacement is recommended.
16
Higher Altitude and conservative Personal Adjustment
Modes will shorten the no-decompression time
limits. These limits at different Altitude and Personal
Adjustment Mode selections are shown in Table 6.1 and
6.2 in section 6.1. “Operating Principles”.
DIVE
MAX
QUIT
NO DEC TIME
The Planning mode also accounts for the following
information from previous dives:
• any calculated residual nitrogen
• all dive history for the past four days
• oxygen toxicity (Nitrox mode)
The no-decompression times given for different depths
will therefore be shorter than before your first “fresh”
dive.
Fig. 3.6. Dive Planning. Planning mode is indicated by
PLAN text. No-decompression
time limit at 30.0 m [100 ft] is
14 minutes in A0/P1 mode.
DIVE NUMBERING SHOWN DURING
DIVE PLANNING
Dives belong to the same repetitive dive series if the
instrument was still counting down the no-fly time at
the beginning of the dive.
The surface interval must be at least 5 minutes for
a dive to be considered a repetitive dive. Otherwise,
it is considered a continuation of the same dive. The
dive number will not change and the dive time will
continue where it left off (see also section 3.6.2. “Dive
Numbering”).
3.1.4. USER DEFINABLE FUNCTIONS
AND ALARMS
This Cobra has several User Definable Functions and
depth and time related alarms that you can set according
to your personal preference.
The dive computer model, unit of measurement and
backlight preferences can be set in the MODE- SETSET PREF submode. The dive time and the depth alarms
can be set in the MODE- SET- SET DIVE submode and
the alarm clock can be set in the MODE- SET- SET
TIME submode. Setting of the user definable functions
and alarms are explained in detail in section 4.3. “Set
Modes”.
17
3.2. SAFETY STOPS
Safety stops are widely considered “good diving practice” and are an integral part of
most dive tables. Reasons to perform a safety stop include a reduction in sub clinical
DCI, microbubble reduction, ascent control, and orientation before surfacing.
The Cobra displays two different types of safety stops: Recommended Safety Stop
and Mandatory Safety Stop.
The Safety Stops are indicated by:
•
•
•
STOP label, when in the depth range 3 m - 6 m [10 ft - 20 ft]
= Recommended Safety Stop Countdown
STOP + CEILING label, when in the depth range 3 m - 6 m [10 ft - 20
ft] = Mandatory Safety Stop Time display
STOP label, when deeper than 6 m
= Mandatory Safety Stop scheduled
3.2.1. RECOMMENDED SAFETY STOP
With every dive over 10 meters the instrument has a three minute countdown for the
recommended safety stop, to be taken in the 3 - 6 meter [10 ft - 20 ft] range. This
is shown with the STOP sign and a three-minute countdown in the center window
instead of the no-decompression time (Fig. 3.11.).
The Recommended Safety Stop, as the name implies, is recommended. If it is
ignored, there is no penalty applied to the following surface intervals and dives.
3.2.2. MANDATORY SAFETY STOP
When the ascent rate exceeds 12 meters/min [40 ft] momentarily or 10 meters/min
[33ft] continuously the micro-bubble build-up is predicted to be more than allowed
for in the decompression model. The Suunto RGBM calculation model responds
to this by adding a Mandatory Safety Stop to the dive. The time of this Mandatory
Safety Stop will depend on the severity of the ascent rate excess.
The STOP sign will appear in the display and when you reach the depth zone between
6 m to 3 m [20 ft to 10] also the CEILING label, ceiling depth and the calculated
Safety Stop time appear in the display. You should wait until the Mandatory Safety
Stop warning disappears (Fig. 3.14.).
The Mandatory Safety Stop time always includes the three minute Recommended
Safety Stop time. The total length of the Mandatory Safety Stop time depends on
the seriousness of the ascent rate violation.
You must not ascend shallower than 3 m [10 ft] with the Mandatory Safety Stop
warning on. If you ascend above the Mandatory Safety Stop ceiling, a downward
pointing arrow will appear and a continuous beeping starts (Fig. 3.15.). You should
immediately descend to, or below, the Mandatory Safety Stop ceiling depth. If
18
you correct this situation at any time during that dive, there are no affects on the
decompression calculations for future dives.
If you continue to violate the Mandatory Safety Stop, the tissue calculation model
is affected and the dive computer shortens the available no-decompression time
for your next dive. In this situation, it is recommended to prolong your surface
interval time before your next dive.
19
3.3. DIVING IN AIR MODE
m
3.3.1. BASIC DIVE DATA
MAX
The dive computer will remain in the Surface mode at
depths less than 1.2 m [4 feet]. At depths greater than
1.2 m the instrument will go into the Diving mode
(Fig. 3.7.).
NO DEC TIME
C
B
T
bar
DIVE TIME
All information on the display is labeled (Fig. 3.7.
and 3.8.). During a no-decompression stop dive, the
following information will be displayed:
Fig. 3.7. Dive has just begun
and no air time is shown. First
estimate of remaining air time
will be shown after 30-60
seconds.
•
•
•
m
•
MAX
AIR TIME
C
B
T
NO DEC TIME
bar
•
DIVE TIME
•
Fig. 3.8. Diving display. Present
depth is 19.3 m [63 ft] and nodecompression stop time limit
is 23 minutes in A0/P1 mode.
Maximum depth during this
dive was 19.8 m [65 ft], elapsed
dive time is 16 minutes.
•
•
m
your present depth in meters [ft]
the Remaining Air time
the Altitude Adjustment setting on the left
side of the center window with a wave and
mountain symbols (A0, A1, or A2) (see Table
3.3.)
the Personal Adjustment setting on the left
side of the center window with a diver symbol
and + signs (P0, P1, or P2) (see Table 3.4.)
the maximum depth during this dive in meters
[ft], indicated as MAX
the cylinder pressure in bar [or psi] displayed
in the lower left corner
the elapsed dive time in minutes, shown as
DIVE TIME in the lower right corner
the available no-decompression time in
minutes in the center window as NO DEC
TIME and as a bar graph on the left side of
the display. It is calculated based on the five
factors described in Section 6.1. “Operating
Principles”.
MAX
AIR TIME
C
B
T
°C
bar
NO DEC TIME
DIVE TIME
TIME
Fig. 3.9. Diving display. Present cylinder pressure is 210 bar [3045 psi]
and remaining air time 41 minutes. Alternative display of current time
and temperature is shown for 5 seconds after pressing TIME button.
20
Alternative displays by pressing the TIME button (Fig.
3.9.):
•
•
m
the current time, shown as TIME
the water temperature followed by °C for
Centigrade [or °F for Fahrenheit].
MAX
AIR TIME
C
B
T
NOTE! In Dive Mode the TIME / TEMPERATURE
display automatically changes back to DIVE TIME
/ CYLINDER PRESSURE after 5 seconds.
3.3.2. BOOKMARK
It is possible to make special marks in the profile memory
during a dive. These Bookmarks will be shown as a dive
log symbol when scrolling the profile memory on the
computer display. The Bookmarks will also be shown as
annotations in the PC-software, Suunto Dive Manager.
To make a bookmark on the profile memory during a
dive press the PLAN button (Fig. 3.10.).
NO DEC TIME
bar
DIVE TIME
Fig. 3.10. Bookmark activation.
An annotation, Bookmark, is
placed in the profile memory
during a dive by pressing PLAN
button. Note Logbook symbol.
m
MAX
STOP
3.3.3. CYLINDER PRESSURE DATA
The air pressure of your scuba cylinder in bars [psi] will
be shown digitally in the lower left corner of the display.
Anytime you enter into a dive, the remaining air time
calculation begins. After 30 - 60 seconds (sometimes
more, depending on your air consumption), the first
estimation of remaining air time will be shown in the left
center window of the display. The calculation is always
based on the actual pressure drop in your cylinder and
will automatically adapt to your cylinder size and current
air consumption.
The change in your air consumption will be based on
constant one second interval pressure measurements over
30 - 60 second periods. An increase in air consumption
will influence the remaining air time rapidly, while a
drop in air consumption will increase the air time slowly.
Thus a too optimistic air time estimation, caused by a
temporary drop in air consumption, is avoided.
The remaining air time calculation includes a 35 bar [500
psi] safety reserve. This means that when the instrument
shows the air time to be zero, there is still about 35 bar
[500 psi] pressure left in your cylinder depending on your
AIR TIME
C
B
T
bar
DIVE TIME
Fig. 3.11. A three minute Recommended Safety Stop.
m
MAX
AIR TIME
C
B
T
bar
NO DEC TIME
DIVE TIME
Fig. 3.12. Cylinder pressure
warnings. Pressure has dropped
below 50 bar [725 psi]. Pressure
display is blinking and there is
an audible alarm.
21
air consumption rate. With a high consumption rate
the limit will be close to 50 bar [725 psi] and with a
low rate close to 35 bar [500 psi].
m
S
L
O
MAX W
STOP
AIR TIME
C
B
T
NOTE! Filling your BC will affect the air time
calculation, due to the temporary increase in air
consumption.
NO DEC TIME
bar
DIVE TIME
NOTE! A change of temperature will affect the
cylinder pressure and consequently the air time
calculation.
Fig. 3.13. Ascent Rate Indicator. Blinking depth reading,
SLOW and four segments are
shown together with an audible
alarm: ascent rate is more than
10 m/min [33 ft/min]. This is
a caution to slow down! STOP
sign means that you are advised
to make a Mandatory Safety
Stop when you reach a depth of
6 m [20 ft].
m
LOW AIR PRESSURE WARNINGS
The dive computer will warn you with three audible
double beeps and a blinking pressure display when
the cylinder pressure reaches 50 bar [725 psi] (Fig.
3.12.). The next three double beeps are heard when
the cylinder pressure reaches 35 bar [500 psi] and
when the remaining air time reaches zero.
CEILING
MAX
STOP
AIR TIME
C
B
T
bar
DIVE TIME
TIME
°C
Fig. 3.14. A Mandatory Safety
Stop. You are advised to make
a Mandatory Safety Stop in the
depth zone between 6 m and
3 m [20 ft and 10 ft]. Pressing
TIME button shows alternative
display.
m
CEILING
STOP
AIR TIME
C
B
T
bar
DIVE TIME
Fig. 3.15. Violated Mandatory Safety Stop. Downward
pointing arrow and an audible alarm indicate you should
descend to ceiling zone.
22
3.3.4. CONSUMED BOTTOM TIME (CBT)
The available no-decompression stop time is also shown visually in the multifunction bar graph on the left side of the display (Fig. 3.7., 3.8. and 3.9.). When
your available no-decompression time decreases below 200 minutes, the first
(lowest) bar graph segment appears. As your body absorbs more nitrogen, more
segments start to appear.
Green Zone - As a safety precaution Suunto recommends you should maintain
the no-decompression bar graph within the green zone. Segments start to appear
when the available no-decompression time decreases below 100, 80, 60, 50, 40,
30 and 20 minutes.
Yellow Zone - As the bars reach the yellow zone, your no-decompression stop time
is less than 10 or 5 minutes and you are getting very close to no-decompression
limits. At this point, you should start your ascent towards the surface.
Red Zone - As all of the bars appear (red zone), your no-decompression stop time
has become zero and your dive has become a decompression stop dive (for more
information see section 3.3.6. “Decompression dives”).
3.3.5. ASCENT RATE INDICATOR
The ascent rate is shown graphically along the right side of the display as
follows:
TABLE 3.2. ASCENT RATE INDICATOR
23
When the maximum allowed ascent rate is exceeded, the fifth SLOW warning
segment and the STOP sign appear and the depth reading starts to blink, indicating
that the maximum ascent rate has been exceeded continuously or that the current
ascent rate is significantly above the allowed rate.
Whenever the SLOW warning segment and the STOP sign appear (Fig. 3.13.),
you should immediately slow down your ascent. When you reach the depth zone
between 6 m to 3 m [20 ft to 10 ft] the STOP and CEILING depth labels will
advise you to make a Mandatory Safety Stop. Wait until the warning disappears
(Fig. 3.14.). You should not ascend shallower than 3 m [10 ft] with the Mandatory
Safety Stop warning on.
WARNING!
DO NOT EXCEED THE MAXIMUM ASCENT RATE! Rapid ascents increase
the risk of injury. You should always make the Mandatory and Recommended
Safety Stops after you have exceeded the maximum recommended ascent rate.
If this Mandatory Safety Stop is not completed the decompression model will
penalize your next dive(s).
3.3.6. DECOMPRESSION DIVES
When your NO DEC TIME becomes zero, your dive becomes a decompression
stop dive, i.e. you must perform one or several decompression stops on your way
to the surface. The NO DEC TIME on your display will be replaced by an ASC
TIME notation and the maximum depth will be replaced by a CEILING notation
and an upward pointing arrow (Fig. 3.16.).
If you exceed the no-decompression limits on a dive, the dive computer will provide
decompression information required for ascent. After this, the instrument will
continue to provide subsequent interval and repetitive dive information.
Rather than requiring you to make stops at fixed depths, the dive computer lets you
to decompress within a range of depths (Continuous Decompression).
24
The ascent time (ASC TIME) is the minimum amount of time needed to reach the
surface in a decompression dive. It includes:
•
•
•
•
•
the time needed to ascend to the ceiling at an ascent rate of 10 m/min
[33 ft/min] plus
the time needed at the ceiling. The ceiling is the shallowest depth to
which you should ascend plus
the time needed at the Mandatory Safety Stop (if any) plus
the 3 minute Recommended Safety Stop plus
the time needed to reach the surface after the ceiling and safety stops
have been completed.
WARNING!
YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DISPLAYED
BY THE INSTRUMENT! The ascent time will increase if you:
- remain at depth
- ascend slower than 10 m/min [33 ft/min] or
- make your decompression stop deeper than at the ceiling.
These factors will also increase the amount of air required to reach the
surface.
CEILING, CEILING ZONE, FLOOR AND DECOMPRESSION
RANGE
When in decompression, it is important that you understand the meaning of ceiling,
floor, and decompression range (Fig. 3.20.):
•
•
•
•
The ceiling is the shallowest depth to which you should ascend when in
decompression. At this depth, or below, you must perform all stops.
The ceiling zone is the optimum decompression stop zone. It is the zone
between the minimum ceiling and 1.8 m [6 ft] below the minimum
ceiling.
The floor is the deepest depth at which the decompression stop time will
not increase. Decompression will start when you pass this depth during
your ascent.
The decompression range is the depth range between the ceiling and
floor. Within this range, decompression takes place. However, it is
important to remember that the decompression will be very slow at, or
close to, the floor.
25
m
CEILING
ASC TIME
AIR TIME
C
B
T
bar
DIVE TIME
Fig. 3.16. Decompression dive,
below floor. Upward pointing
arrow, blinking ASC TIME
label and an audible alarm tell
you to ascend. Minimum total
ascent time including safety
stop is 7 minutes. Ceiling is at 3
m [10 ft].
m
The depth of the ceiling and floor will depend on your
dive profile. The ceiling depth will be fairly shallow when
you enter the decompression mode, but if you remain at
depth, it will move downward and the ascent time will
increase. Likewise, the floor and ceiling may change
upwards while you are decompressing.
When conditions are rough, it may be difficult to
maintain a constant depth near the surface. In this case
it will be more manageable to maintain an additional
distance below the ceiling, to make sure that the waves
do not lift you above the ceiling. Suunto recommends
that decompression takes place deeper than 4 m [13 ft],
even if the indicated ceiling is shallower.
NOTE! It will take more time and more air to
decompress below the ceiling than at the ceiling.
CEILING
WARNING!
ASC TIME
AIR TIME
C
B
T
bar
DIVE TIME
Fig. 3.17. Decompression dive,
above floor. Upward pointing
arrow has disappeared and ASC
TIME label has stopped blinking, which means that you are in
the decompression range.
m
NEVER ASCEND ABOVE THE CEILING! You
must not ascend above the ceiling during your
decompression. In order to avoid doing so by accident,
you should stay somewhat below the ceiling.
DISPLAY BELOW THE FLOOR
The blinking ASC TIME and an upward pointing arrow
indicate that you are below the floor (Fig. 3.16.). You
should start your ascent immediately. The ceiling depth
is shown on the right top corner and the minimum total
ascent time on the right side of the center window.
CEILING
MAX
STOP ASC TIME
AIR TIME
C
B
T
°C
26
bar
DIVE TIME
TIME
Fig. 3.18. Decompression dive, at ceiling zone. Two arrows
point at each other (“hour glass”). You are in the optimum
ceiling zone at 3.5 m [11 ft] and your minimum ascent time is
5 minutes. Pressing TIME button activates alternative display.
DISPLAY ABOVE THE FLOOR
When you ascend above the floor, the ASC TIME display
stops blinking and the upward pointing arrow disappears
(Fig. 3.17.). Decompression will now begin, but is very
slow. You should therefore continue your ascent.
m
CEILING
STOP ASC TIME
AIR TIME
C
B
T
bar
DIVE TIME
DISPLAY AT THE CEILING ZONE
When you reach the ceiling zone, the display will show
you two arrows pointing at each other (the “hour glass”
icon, Fig 3.18.). Do not ascend above this zone.
During the decompression stop, ASC TIME will count
down towards zero. When the ceiling moves upwards,
you can ascend to the new ceiling. You may surface
only after the ASC TIME and CEILING labels have
disappeared, which means that the decompression stop
and any Mandatory Safety Stop has been completed. You
are advised, however, to stay until the STOP sign has also
gone. This indicates that the three minute Recommended
Safety Stop has also been completed.
Fig. 3.19. Decompression dive,
above ceiling. Note downward
pointing arrow, Er warning and
an audible alarm. You should
immediately (within 3 minutes)
descend to or below ceiling.
DISPLAY ABOVE THE CEILING
If you ascend above the ceiling during a decompression
stop, a downward pointing arrow will appear and a
continuous beeping starts (Fig. 3.19.). In addition, an
error warning Er reminds you that you have only three
minutes to correct the situation. You must immediately
descend to or below the ceiling.
If you continue to violate the decompression, the dive
computer goes into a permanent Error Mode. In this
mode the instrument can only be used as a depth gauge
and timer. You must not dive again for at least 48 hours
(see also section 3.9. “Error Conditions”).
CEILING
3m / 10ft
6m / 18ft
FLOOR
Fig. 3.20. Ceiling and Floor
zone. Recommended and
Mandatory Safety Stop zone
between 6 m and 3 m [20 ft and
10 ft].
27
3.4. DIVING IN NITROX MODE
m
3.4.1. BEFORE DIVING
PO2
This dive computer can be set for diving with standard air
only (Air mode) or it can be set for diving with Enriched
Air Nitrox (EANx) (Nitrox mode).
O2%
OLF
Fig. 3.21. Nitrox display. Maximum depth based on set O2%
(21%) and PO2 (1.4 bar) is 54.1
m [177 ft].
m
MAX
O2%
NO DEC TIME
OLF
bar
DIVE TIME
Fig. 3.22. Diving in Nitrox
mode. The O2% is set to 32%.
If set to the Nitrox mode, the correct oxygen percentage
of the gas in your cylinder must always be entered into
the computer to ensure correct nitrogen and oxygen
calculations. The dive computer adjusts its mathematical
nitrogen and oxygen calculation models according to
the entered O2% and PO2 values. Calculations based
on Nitrox result in longer no-decompression times and
shallower maximum depths. When the dive computer
is set in Nitrox mode then the Dive Planning and Dive
Simulation modes both calculate with the O2% and PO2
values that are currently in the computer.
DEFAULT NITROX SETTINGS
In the Nitrox mode, the default setting is for standard
air (21% O2). It remains in this setting until the O2%
is adjusted to any other percentage of oxygen (22%
- 50%).
If unused, the computer will retain the manually entered
value for the selected oxygen percentage for about two
hours, after which it will revert to the default setting of
21% O2.
The default setting for maximum oxygen partial pressure
is 1.4 bar, however you are able to set it in the range of
1.2 - 1.6 bar.
28
3.4.2. OXYGEN DISPLAYS
If set to Nitrox mode the NITROX display, with all
labeled oxygen information and the label NITROX, is
shown after activation. In Dive Planning mode the nitrox
display shows (Fig. 3.21.):
m
MAX
AIR TIME
NO DEC TIME
OLF
•
•
•
•
the oxygen percentage, labeled with O2%, is
shown in the left side of the center window
the set oxygen partial pressure limit, labeled
with PO2, is shown in the upper right display
the maximum allowed depth based on the set
oxygen percentage and partial pressure limit
the current oxygen toxicity exposure shown
with an Oxygen Limit Fraction (OLF) bar
graph along the left side of the display
(instead of the CBT).
In the Dive modes, the oxygen percentage labeled with
O2% and the current oxygen toxicity exposure shown
with an Oxygen Limit Fraction (OLF) bar graph are
shown (Fig. 3.22. and Fig. 3.23.). The O2% is shown until
the remaining air time is less than 30 minutes. After this,
the remaining air time is displayed in its place. During
a dive, the oxygen partial pressure, labeled with PO2, is
also shown instead of the maximum depth in the upper
right display, if the partial pressure is greater than 1.4
bar or the set value (Fig. 3.24.).
By pressing the TIME button during a nitrox dive,
the alternative display appears, which includes (Fig.
3.25.):
•
•
•
•
•
bar
DIVE TIME
Fig. 3.23. Diving in Nitrox
mode. After air time is less than
30 minutes O2% is substituted
by Air Time display.
m
PO2
O2%
NO DEC TIME
OLF
bar
DIVE TIME
Fig. 3.24. Oxygen partial pressure and OLF displays. There
is an audible alarm as oxygen
partial pressure is greater than
1.4 bar or set value, and/or the
OLF has reached 80% limit.
current time
temperature
Consumed Bottom Time
maximum depth (during decompression stop
dive).
Oxygen percentage when remaining air time
less than 30 min
After five seconds the display will automatically revert
to the original display.
29
3.4.3. OXYGEN LIMIT FRACTION (OLF)
m
MAX
O2%
NO DEC TIME
C
B
T
°C
TIME
Fig. 3.25. Alternative display.
Pressing TIME button displays
current time, maximum depth,
temperature, CBT and O2%,
if Air Time is less than 30
minutes.
m
MAX
AIR TIME
NO DEC TIME
OLF
bar
DIVE TIME
Fig. 3.26. The lowest bar graph
blinks to indicate that the OLF
value shown relates to OTU.
30
In addition to tracking the diver’s exposure to nitrogen,
the instrument tracks the exposure to oxygen, if set to
Nitrox mode. These calculations are treated as entirely
separate functions.
The dive computer calculates separately for Central
Nervous System oxygen toxicity (CNS) and Pulmonary
Oxygen toxicity, the latter measured by the addition of
Oxygen Toxicity Units (OTU). Both fractions are scaled
so that the maximum tolerated exposure for each is
expressed as 100%.
The Oxygen Limit Fraction (OLF) has 11 segments, each
representing 10%. The OLF bar graph displays only the
value of the higher of the two calculations. When the
OTU value meets and exceeds the CNS value then in
addition to displaying its percentage the lowest segment
blinks to indicate that the value shown relates to OTU.
The oxygen toxicity calculations are based on the factors
listed in section 6.3. “Oxygen Exposure”.
3.5. DIVING IN GAUGE MODE
If set to Gauge mode, the dive computer can be used
for diving with technical diving mixed gases. If you are
trained for technical diving and you plan to use Gauge
mode on a regular basis, it may be preferable to set the
instrument permanently to its Gauge mode (see section
4.3. “Set Modes”).
If set to Gauge mode the text GAUGE is shown after
activation (Fig. 3.4.).
In the Gauge mode the present depth, maximum depth,
dive time, cylinder pressure, remaining air time and
ascent rate indicator are displayed during the dive (Fig.
3.27.). In addition, temperature and current time are
shown in the alternative display.
m
MAX
AIR TIME
bar
DIVE TIME
Fig. 3.27. Diving in Gauge
mode.
NOTE! If you dive with the Gauge mode, it is not
possible to change between the modes within 48
hours.
31
3.6. AT THE SURFACE
m
3.6.1. SURFACE INTERVAL
MAX
NO
bar
DIVE TIME
Fig. 3.28. Surface display.
You have surfaced from a 18
minute dive, which maximum
depth was 20.0 m [66 ft]. The
present depth is 0.0 m [0 ft].
Airplane symbol indicates that
you should not fly and diver
attention symbol indicates that
you should prolong your surface
interval time because of excess
micro-bubbles.
An ascent to any depth shallower than 1.2 m [4 ft]
will cause the DIVING display to be replaced by the
SURFACE display, giving the following information
(Fig. 3.28.):
•
•
•
•
•
•
•
•
m
MAX
SURF
NO
•
•
TIME
°C
maximum depth of last dive in meters [ft]
present depth in meters [ft]
no-flying warning indicated by an airplane
icon
Altitude Adjustment setting
Personal Adjustment setting
Diver attention symbol indicates if you should
prolong your surface interval time
STOP label for 5 min, if the Mandatory Safety
Stop was violated
Er, if the decompression ceiling was violated
(= Error Mode) (Fig. 3.31.)
Cylinder pressure in bars [psi]
dive time of last dive in minutes, shown as
DIVE TIME.
TIME
Or when the TIME button is pressed once or twice:
Fig 3.29. Surface interval, Surface
time display. Pressing TIME button
once will show surface time display.
•
•
•
•
32
the current time, shown as TIME instead of the
DIVE TIME
the current temperature with °C for Centigrade
[or °F for Fahrenheit]
the surface time in hours and minutes
(separated by a colon), telling the duration of
the present surface interval (Fig. 3.29.)
the desaturation/no-flying time in hours and
minutes is shown next to the airplane in the
center window of the display (Fig. 3.30.).
If set to Nitrox mode, the following information will
also be shown:
•
•
the oxygen percentage labeled with O2% is
shown on the left side of the center window
the current oxygen toxicity exposure shown
with an Oxygen Limit Fraction (OLF) bar
graph along the left side of the display.
3.6.2. DIVE NUMBERING
Several repetitive dives are considered to belong to the
same repetitive dive series when the dive computer has
not counted the no-flying time to zero. Within each
series, the dives are given individual numbers. The
first dive of the series will be numbered as DIVE 1, the
second as DIVE 2, the third as DIVE 3, etc.
If you start a new dive with less than 5 minutes of
surface interval time, the dive computer interprets this
as a continuation of the previous dive and the dives are
considered to be the same. The diving display will return,
the dive number will remain unchanged, and the dive
time will begin where it left off. After 5 minutes on the
surface, subsequent dives are, by definition, repetitive.
The dive counter displayed in the Planning Mode will
increment to the next higher number if another dive is
made.
m
MAX
NO
°C
TIME
Fig. 3.30. Surface interval,
no-flying time. Pressing TIME
button twice will show no-flying
time, indicated by an airplane
symbol.
m
MAX
NO
°C
DIVE TIME
NO
Fig. 3.31. Surface Mode after
a violated decompression dive.
Er symbol indicates that you
have violated the ceiling for
more than three minutes. You
must not dive again for at least
48 hours.
Diver Attention Symbol
Violated Decompression
Ceiling
NO
Do Not Fly Symbol
33
3.6.3. FLYING AFTER DIVING
The no-flying time is shown in the center window next to the airplane image. Flying
or travelling to a higher altitude should be avoided at any time the computer counts
down the no-flying time.
NOTE! The airplane symbol is not shown on the stand-by display. You should
always activate the dive computer and check that the airplane symbol is not
displayed prior to flying.
The no-flying time is always at least 12 hours or equivalent to the so-called
desaturation time (if longer than 12 hours).
In the permanent Error mode and Gauge mode the no-flying time is 48 hours.
Divers Alert Network (DAN) recommends the following on no-flying times:
•
•
•
•
•
34
A minimum surface interval of 12 hours would be required in order to
be reasonably assured a diver will remain symptom free upon ascent to
altitude in a commercial jetliner (altitude up to 2400 m [8000 ft]).
Divers who plan to make daily, multiple dives for several days, or make
dives that require decompression stops, should take special precautions
and wait for an extended interval beyond 12 hours before flight. Further,
the Undersea and Hyperbaric Medical Society (UHMS) suggests divers
using standard air tanks and exhibiting no symptoms of decompression
illness wait 24 hours after their last dive to fly in an aircraft with
cabin pressure up to 2400 m [8000 ft]. The only two exceptions to this
recommendation are:
If a diver had less than 2 hours total accumulated dive time in the last 48
hours, then a 12 hour surface interval before flying is recommended.
Following any dive that required a decompression stop, flying should be
delayed for at least 24 hours, and if possible, for 48 hours.
Suunto recommends that flying is avoided until all the DAN and UHMS
guidelines and the dive computer wait to fly conditions are satisfied.
3.7. AUDIBLE AND VISUAL ALARMS
The dive computer features audible and visual alarms to advise when important
limits are approached or to acknowledge preset alarms.
A short single beep occurs, when:
•
•
the dive computer is activated.
when the dive computer automatically returns to the TIME mode.
Three double beeps occur, when:
•
•
•
the cylinder pressure reaches 50 bar [725 psi]. The cylinder pressure
display will start to blink (Fig. 3.12.).
the cylinder pressure reaches 35 bar [500 psi].
the calculated remaining air time reaches zero.
Three single beeps with a two second interval and the backlight activated for
5 seconds occur, when:
•
the no-decompression dive turns into a decompression stop dive. An
arrow pointing upwards and the blinking ascent warning ASC TIME
will appear (Fig. 3.16.).
Continuous beeps and the backlight activated for 5 seconds occur, when:
•
•
•
the maximum allowed ascent rate, 10 m/min [33 ft/min], is exceeded.
SLOW and STOP warnings will appear (Fig. 3.13.).
the Mandatory Safety Stop ceiling is exceeded. A downward pointing
arrow will appear (Fig. 3.15.).
the decompression ceiling depth is exceeded. An error warning Er and a
downward pointing arrow appear. You should immediately descend to,
or below, the ceiling. The instrument will otherwise enter a permanent
Error Mode within three minutes, indicated by a permanent Er (Fig.
3.19.).
35
You are able to preset alarms before the actual dive. The user programmable alarms
can be set for maximum depth, dive time and time. The alarms activate when:
•
•
•
The preset maximum depth is reached
- continuous beep series for 24 seconds or until any button is
pressed.
- the maximum depth blinks as long as the present depth value
exceeds the adjusted value.
The preset dive time is reached
- continuous beep series for 24 seconds or until any button is
pressed.
- the dive time blinks for one minute, if no button is pressed.
The preset alarm time is reached
- the current time is shown.
- continuous beep series for 24 seconds or until any button is
pressed.
- the current time blinks for one minute, if no button is pressed.
OXYGEN ALARMS IN NITROX MODE
Three double beeps and the backlight activated for 5 seconds occur, when:
•
the OLF bar graph reaches 80%. The segments exceeding the 80% limit
start to blink (Fig. 3.24.)
• the OLF bar graph reaches 100%.
The blinking of the segments exceeding 80% will stop, when the OLF is not loading
anymore. At that point the PO2 is less than 0.5 bar.
Continuous beeps for 3 minutes and the backlight activated for 5 seconds
occur, when:
•
the set oxygen partial pressure limit is exceeded. The maximum depth
is replaced with a current blinking PO2 value. You should immediately
ascend above the PO2 depth limit (Fig. 3.24.).
NOTE! When the backlight is turned OFF, it does not illuminate when an
alarm is activated.
36
WARNING!
WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE
MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY ASCEND
UNTIL THE WARNING STOPS BLINKING! Failure to take action to reduce
oxygen exposure after the warning is given can rapidly increase the risk of
oxygen toxicity and the risk of injury or death.
3.8. HIGH ALTITUDE DIVES AND PERSONAL
ADJUSTMENT
The dive computer can be adjusted both for diving at altitude and also to increase
the conservatism of the mathematical nitrogen model.
3.8.1. ALTITUDE ADJUSTMENT
When programming the instrument for the correct altitude, you need to select the
correct Altitude Mode according to Table 3.3. The dive computer will adjust its
mathematical model according to the entered altitude mode, giving shorter nodecompression times at higher altitudes (see Section 6.1. “Operating Principles”,
Table 6.1. and 6.2.).
TABLE 3.3. ALTITUDE ADJUSTMENT RANGES
The entered Altitude Adjustment Mode is indicated by mountain symbols (A0, A1
= one mountain, or A2 = two mountains). Section 4.3.1.1. “Altitude Adjustment
and Personal Adjustment Setting” describes how the Altitude Mode is adjusted.
Traveling to a higher elevation can temporarily cause a change in the equilibrium
of dissolved nitrogen in the body. It is recommended that you acclimate to the new
altitude by waiting at least three hours before making a dive.
37
3.8.2. PERSONAL ADJUSTMENT
There are adverse personal factors for DCI which divers can predict in advance
and input into the decompression model. Factors that may affect susceptibility to
decompression illness vary between divers and also for the same diver from one
day to another. The three-step Personal Adjustment Mode is available, if a more
conservative dive plan is desired.
The personal factors which tend to increase the possibility of DCI include, but
are not limited to:
•
•
•
cold exposure - water temperature less than 20 °C [68 °F]
the diver is below average physical fitness level
diver fatigue
•
•
•
•
diver dehydration
previous history of DCI
stress
obesity
The Personal Adjustment Mode is indicated by a diver symbol and plus signs (P0
= a diver, P1 = diver +, or P2 = diver ++). Section 4.3.1.1. “Altitude Adjustment
and Personal Adjustment Setting” describes how the Personal Mode is adjusted.
This feature should be used to adjust the computer to be more conservative,
according to personal preference, by entering the suitable Personal Adjustment
Mode with the help of Table 3.4. In ideal conditions, retain the default setting, P0.
If conditions are more difficult or other mentioned factors which tend to increase
the possibility of DCI exist, select P1 or even the most conservative P2. As a
result the dive computer adjusts its mathematical model according to the entered
Personal Adjustment Mode, giving shorter no-decompression times (see section
6.1. “Operating Principles”, Table 6.1 and 6.2).
TABLE 3.4. PERSONAL ADJUSTMENT RANGES
38
3.9. ERROR CONDITIONS
The dive computer has warning indicators that alert the user to react to certain
situations that would significantly increased risk thew of DCI. If you do not respond
to its warnings, the dive computer will enter an Error Mode, indicating that the
risk of DCI has greatly increased. If you understand and operate the dive computer
sensibly, it is very unlikely you will ever put the instrument into the Error Mode.
OMITTED DECOMPRESSION
The Error Mode results from omitted decompression, i.e. when you stay above
the ceiling for more than three minutes. During this three-minute period the Er
warning is shown and the audible alarm beeps. After this, the dive computer will
enter a permanent Error Mode. The instrument will continue to function normally
if you descend below the ceiling within this three-minute period.
Once in the permanent Error Mode only the ER warning is shown in the center
window. The dive computer will not show times for ascent or stops. However, all
the other displays will function as before to provide information for ascent. You
should immediately ascend to a depth of 3 to 6 m [10 to 20 ft] and remain at this
depth until air supply limitations require you to surface.
After surfacing, you should not dive for a minimum of 48 hours. During the
permanent Error Mode, the Er text will be displayed in the center window and the
Planning Mode will be disabled.
39
4. MENU BASED MODES
To make yourself familiar with the menu based
functions, please use your Quick Reference Guide
supplied with the Cobra together with the information
in this chapter.
QUIT
The main menu based functions are grouped under 1)
memory, 2) dive simulation and 3) setting modes.
OPTIONS
THE USE OF THE MENU BASED
FUNCTIONS
Fig. 4.1. Main menu based
Mode options. [3 MODE].
1. Activate the menu based modes by pressing once
the SMART (MODE) button in the Dive Mode
(Fig. 4.1.).
2. Scroll the mode options by pressing the arrow up/
down buttons. When scrolling the options, the
label and an equivalent number are shown on the
display (Fig. 4.2. - 4.4.).
3. Press the SMART (Select) button once to select
the desired option.
SELECT
Fig. 4.2. Memory option.
MEMORY].
[1
4. Scroll the submode options by pressing the arrow
up/down buttons. When scrolling the options, the
label and an equivalent number are shown on the
display.
5. Select the desired option by pressing once the
SMART (Select) button. Repeat the procedure, if
there are more submodes.
6. Depending on the mode, you are now able to have
a look at the memories, simulate a dive, or make
desired settings (use the the arrow up/down
buttons). The SMART button is used to Quit or to
confirm the settings (OK).
SELECT
Fig. 4.3. Simulation option. [2
SIMUL].
40
If you do not press any of the buttons for 5 minutes
while in a Menu based mode, the instrument beeps
and returns to the timekeeping display. In the
Simulation Mode, however, the equivalent time is
60 minutes.
EXIT / QUIT!
By pressing the SMART button for more than 1 second,
any menu based function or submode can be quit and the
dive computer will return directly to the Dive Mode.
SELECT
THE LIST OF THE MENU BASED MODES
1 . M E M O R I E S A N D DATA T R A N S F E R [ 1
MEMORY]
Fig. 4.4. Set option. [3 SET].
1. Logbook and Dive Profile Memory [1 LOGBOOK]
2. Dive History Memory [2 HISTORY]
3. Data Transfer and PC-Interface [3 TR-PC]
2. SIMULATION MODE [2 SIMUL]
1. Dive Simulator [1 SIMDIVE]
2. Dive Planning Simulator [2 SIMPLAN]
3. SET MODES [3 SET]
1. Dive Parameter Settings [1 SETDIVE]
QUIT
1. Altitude Adjustment and Personal Adjustment Settings [1 AdJ MODE]
OPTIONS
2. Dive Time Alarm Setting [2 d ALARM]
3. Maximum Depth Alarm Setting [3 MAX DPTH]
Fig. 4.5. Memory options.
MEMORY].
4. Nitrox/Oxygen Settings [4 NITROX]
2. Setting Time [2 SET TIME]
[3
1. Adjusting Time [1 AdJ TIME]
2. Adjusting Date [2 AdJ DATE]
3. Adjusting Daily Alarm [3 T ALARM]
3. Setting Preferences [3 SET PREF]
1. Backlight Setting [1 LIGHT]
2. Dive Computer Units Setting
ric/Imperial) [2 UNITS]
(Met-
3. Dive Computer Model Settings
(Air/Nitrox/Gauge) [3 MODEL]
NOTE! The menu based modes cannot be activated
until 5 minutes after the dive.
SELECT
Fig. 4.6. Logbook option.
LOGBOOK].
[1
41
page 1
DIVE
The memory options (Fig. 4.5.) for this dive computer
include the combined Logbook and Dive Profile
Memory (Fig. 4.6. - 4.12.), Dive History Memory (Fig.
4.13. - 4.14.) and the Data Transfer and PC-Interface
functions (Fig. 4.15.).
SELECT
TIME
4.1. MEMORIES AND DATA
TRANSFER [1 MEMORY]
Fig. 4.7. Logbook, page I. Scroll
different pages of specific dive.
The dive entry time and date is registered in the
Logbook memory. Always check before diving that
the time and date are correctly set, especially after
travelling between different time zones.
4.1.1. LOGBOOK AND DIVE PROFILE
MEMORY [1 LOGBOOK]
page 2
DIVE
S
L
O
MAX W
O2%
STOP ASC TIME
QUIT
OLF
°C
DIVE TIME
This instrument has a very sophisticated high capacity
Logbook and Profile Memory, with data being recorded
every 20 seconds. Dives shorter than the recording
interval are not registered. You have the possibility to
set the recording interval to 10, 20, 30 or 60 seconds
with the optional PC-interface unit and software.
To enter the Logbook Memory Mode select MODE- 1
MEMORY- 1 LOGBOOK.
For each dive there are four pages of logbook dive
information. Use the scroll buttons to scroll the display
between Logbook pages I, II, III and IV. The data of
the most recent dive is shown first.
Fig. 4.8. Logbook, page II.
Main dive related data.
The logbook dives can be scrolled through displaying
only the first page of each dive, or scrolling through
the 4 different pages of a dive.
page 3
DIVE
AVG
SURF
QUIT
TIME
bar
Fig. 4.9. Logbook, page III. Surface
interval time, average depth and
consumed air indicated by ∆P.
42
When at the first page of a dive use the MODE button
to change the scroll sequence. When the arrow icon is
next to the Mode button the scroll button will scroll
through the first page only of each dive.
When Select is displayed next to the mode button the
scroll buttons will scroll through the four pages of the
selected dive.
The END text is displayed between the oldest and most
recent dive. (Fig. 4.12.)
Note that chronological sequence in the logbook is
determined by the date, not by the dive number.
DIVE
The following information will be shown on four
pages:
QUIT
Page I, main display (Fig. 4.7.)
DIVE TIME
•
•
dive number in the dive series
dive entry time and date.
Page II (Fig. 4.8.)
•
•
•
•
•
•
•
•
•
•
•
•
•
page 4
Fig. 4.10. Logbook, page IV.
Profile of specific dive.
dive number in the dive series
maximum depth
(NOTE! Due to lower resolution, the reading
may differ from the maximum depth reading
of the Dive History up to 0.3 m [1 ft].)
total dive time
temperature at the maximum depth
Altitude Adjustment setting (not displayed in
Gauge mode)
Personal Adjustment setting (not displayed in
Gauge mode)
SLOW label, if the diver has violated the
maximum ascent rate
STOP label, if the Mandatory Safety Stop was
violated
ASC TIME label, if the dive was a
decompression stop dive
Diver attention symbol, if the dive was started
while symbol was displayed
downward pointing arrow, if the ceiling was
violated
oxygen percentage (only in Nitrox mode)
maximum OLF during the dive (only in Nitrox
mode).
DIVE
TIME
SELECT
Fig. 4.11. Logbook, page I.
Press SMART (Select) button
once to be able to scroll between
different dives.
QUIT
Fig. 4.12. Logbook, end of the
memory. END text is displayed
between oldest and the most
recent dive.
43
Page III (Fig. 4.9.)
•
•
•
•
dive number in the dive series
average depth
surface interval time before the dive
∆P describing Cylinder pressure drop during the dive.
Page IV (Fig. 4.10.)
•
•
•
dive number in the dive series
the profile of the dive, automatic scrolling during which:
logbook symbol blinks when the user has pressed the PLAN button for
Bookmark
• blinking SLOW label when registered
• blinking ASC TIME label when the dive became a decompression dive.
Press the SMART (Select) button once to change the scroll buttons to scroll the
different dives forward and backward (Fig. 4.11.). Press the SMART (>Select)
button again to change function of the scroll buttons back to scroll the different
pages of the selected dive. When searching the dives, only the page 1 is shown. The
END text is displayed between the oldest and the most recent dive (Fig. 4.12.).
The memory will retain approximately the last 36 hours of dive time. After that,
when new dives are added, the oldest dives are deleted. The contents of the memory
will remain when the battery is changed (assuming that the replacement has been
done according to the instructions).
DIVE PROFILE MEMORY [PROF]
The scrolling of the profile will start automatically when the Logbook page IV
(PROF) is entered.
With the default setting, the dive profile is recorded and displayed in 20-second
increments with each display being shown for about three seconds. The depths
shown are the maximum values of each interval.
Pressing any button stops the scrolling of the profile.
NOTE! Several repetitive dives are considered to belong to the same repetitive
dive series if the no-flying time has not ended. See “Dive Numbering” in section
3.6.2. for further information.
44
4.1.2. DIVE HISTORY MEMORY
[2 HISTORY]
The Dive History is a summary of all the dives recorded
by the dive computer. To enter the Dive History Memory
Mode select MODE- 1 MEMORY- 2 HISTORY (Fig.
4.13.).
SELECT
The following information will be shown on the display
(Fig. 4.14.):
• the maximum depth ever reached
• the total accumulated dive time in hours
• the total number of dives.
The Dive History Memory can hold a maximum of
999 dives and 999 diving hours. When these maximum
values are reached, the counters will start again from
zero.
Fig. 4.13. Dive History Memory
Mode. [2 HISTORY].
DIVE
NOTE! The maximum depth can be reset to 0.0 m [0
ft] using the optional PC-Interface unit and Suunto
Dive Manager software.
MAX
QUIT
DIVE TIME
4.1.3. DATA TRANSFER AND PCINTERFACE [3 TR-PC]
The instrument can be connected to an IBM compatible
personal computer (PC), using the optional PC-Interface
and software. With the PC-Interface unit, dive data
from the dive computer can be downloaded to a PC.
The PC software can be used for educational and
demonstration purposes, for planning dives, and for
keeping a complete record of your dive history with
the instrument. Additional Logbook data can also be
added. Paper copies of your dive log and profiles can
easily be printed.
The data transfer is carried out using the connector on
the bottom of the unit.
Fig. 4.14. Dive History information. Total number of dives, dive
hours and maximum depth.
SELECT
Fig. 4.15. Data Transfer mode.
[3 TR-PC].
45
The following data is transferred to the PC:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
depth profile of the dive
dive time
preceding surface interval time
dive number
Altitude and Personal adjustment settings
oxygen percentage setting and maximum OLF (in Nitrox mode)
tissue calculation data
temperature at the beginning of the dive, maximum depth and end of the
dive
dive entry time (year, month, day and time)
additional dive information (e.g. SLOW and Mandatory Safety Stop
violations, Diver Attention Symbol, Bookmark, Surfaced Mark,
Decompression Stop Mark, Ceiling Error Mark)
dive computer serial number
personal 30 character information
cylinder pressure at the beginning and at the end of the dive (i.e. pressure
drop ∆P during dive)
surface air consumption.
Using the PC software, you are able to enter setup options such as:
•
change the sample rate for profile records/logbook from the default 20
second interval to 10, 30 or 60 seconds
•
•
input a personal, 30 character field into the Cobra (i.e. your name)
reset the Dive History’s maximum depth to zero.
It is also possible to manually add comments and other personal information to
the PC based dive data files. The PC-Interface package comes complete with the
interface unit, the software and an installation guide.
To enter the Data Transfer mode select MODE- 1 MEMORY- 3 TR - PC (Fig.
4.15.).
NOTE! While in the Data Transfer mode, the connector/water contacts are
used only for the data transfer. The Dive Mode IS NOT automatically activated
if the contacts are submerged.
After you have finished the data transfer, press the SMART (Quit) to exit Data
Transfer mode. If a button is not pressed or no data is transferred within 5 minutes,
the instrument beeps and returns to the timekeeping display automatically.
46
4.2. SIMULATION MODE [2 SIMUL]
The Simulation mode can be used to acquaint yourself
with the features and displays of the instrument before
diving, to plan dives in advance, for demonstration or
education purposes, or just for pleasure.
QUIT
The dive computer has two simulation modes (Fig.
4.16.):
•
•
The DIVE SIMULATOR (Fig. 4.17.)
The DIVE PLANNING SIMULATOR (Fig.
4.19.).
In Simulation Mode, time moves four times faster than
real time (when diving), i.e., 15s = 1min.
OPTIONS
Fig. 4.16. Dive Simulation options. [2 SIMUL].
4.2.1. DIVE SIMULATOR [1 SIMDIVE]
The Dive Simulator mode is an excellent tool for
becoming familiar with the dive computer and
planning your dives. Suunto recommends using the
dive simulator to run through different dive scenarios.
The Dive Simulator will allow you to “perform” dive
profiles of your choice and see what the display would
look like during an actual dive. This includes basic dive
information, as well as audible and visual warnings.
Cylinder pressure drop is simulated with a constant,
depth dependant consumption.
SELECT
Fig. 4.17. Dive Simulator mode.
[1 SIMDIVE].
To enter the Dive Simulator mode select MODE- 2
SIMUL- 1 SIMDIVE (Fig. 4.17. and 4.18.).
m
QUIT
bar
DIVE TIME
Fig. 4.18. Selected Dive Simulator mode. Descend by
pressing the arrow down (TIME) button and ascend by
pressing the arrow up (PLAN) button.
47
4.2.2. DIVE PLANNING SIMULATOR [2
SIMPLAN]
SELECT
Fig. 4.19. Dive Planning Simulator mode. [2 SIMPLAN].
The Dive Planning Simulator mode shows you the
present no-decompression limits. In this mode, you are
also able to add the desired surface interval increment to
present surface interval time, which allows you to plan
your dives in advance.
This mode is also used to add the desired surface
intervals for dive simulations. Add the desired surface
interval increment to present surface interval by
pressing the arrow down (TIME) and arrow up (PLAN)
buttons.
To enter the Dive Planning Simulator mode select
MODE- 2 SIMUL- 2 SIMPLAN (Fig. 4.19.).
NOTE! This display is only shown for repetitive
dives.
SURF
OK
TIME
Fig. 4.20. Selected Dive Planning Simulator mode. Add
desired surface interval increment (to present shown surface
interval) by pressing TIME and
PLAN buttons. This display is
only shown for repetitive dives.
DIVE
MAX
QUIT
NO DEC TIME
Fig. 4.21. Dive Planning
Simulation.
48
NOTE! The Dive Planning Simulator mode is
disabled in Gauge mode and in Error mode (see
section 3.9. “Error Conditions”).
4.3. SET MODES [3 SET]
The Set Modes (Fig. 4.22.) are divided into three
submodes for setting the dive-related parameters, timerelated parameters and your personal preferences.
4.3.1. DIVE PARAMETER SETTINGS [1
SET DIVE]
To enter the Dive Parameter Setting Mode select MODE3 SET- 1 SET DIVE. The Dive Parameter Setting mode
has two to four options depending on the dive computer
mode. In Gauge mode there are two options, in Air mode
three options and in Nitrox mode four options.
QUIT
OPTIONS
Fig. 4.22. Setting Options.
SET].
[3
4.3.1.1. ALTITUDE ADJUSTMENT AND
PERSONAL ADJUSTMENT SETTINGS
[1 ADJ MODE]
The current Altitude and Personal Adjustment modes are
shown when diving and at the surface. If the mode does
not match the altitude or personal conditions (see section
3.8. “High Altitude Dives and Personal Adjustment”), it
is imperative that you enter the correct selection before
diving. Use the Altitude Adjustment to select the correct
altitude mode. Use the Personal Adjustment to add an
extra level of conservatism.
To enter the Altitude Adjustment and Personal
Adjustment Setting mode, select MODE- 3 SET- 1
SET DIVE- 1 AdJ MODE. Now you are able to select
from the three altitude modes (Fig. 4.23.) and the three
personal modes (Fig. 4.24.).
OK
Fig. 4.23. Setting Altitude
adjustment. Press scroll buttons
to change altitude mode.
OK
Fig. 4.24. Setting Personal
adjustment. Press scroll buttons
to change personal mode.
49
4.3.1.2. DIVE TIME ALARM SETTING
[2 D ALARM]
OK
DIVE TIME
Fig. 4.25. Setting Dive Time
Alarm. Press scroll buttons to
change alarm on/off and to set
dive time value.
The instrument has one Dive Time Alarm Setting,
which can be used for several purposes to add to your
diving safety. The alarm can be set, for example, to your
planned bottom time.
To enter the Dive Time Alarm Setting Mode select
MODE- 3 SET- 1 SET DIVE- 2 d ALARM. The Dive
Time alarm can be set on or off and the time from 1 to
999 minutes.
4.3.1.3. MAXIMUM DEPTH ALARM
SETTING [3 MAX DPTH]
You can set one depth alarm in the dive computer.
To enter the Maximum Depth Alarm Setting select
MODE- 3 SET- 1 SET DIVE- 3 MAX DEPTH .
m
MAX
OK
Fig. 4.26. Setting Maximum
Depth Alarm. Press scroll buttons to change alarm on/off and
to set maximum depth value.
m
PO2
O2%
OK
The depth alarm is set to 40 m [131 ft] at the factory,
but you are able to adjust it according your personal
preference or switch it off. The depth range can be set
from 3.0 m to 100 m [9 ft to 328 ft] (Fig. 4.26.).
4.3.1.4. NITROX/OXYGEN SETTINGS
[4 NITROX]
If set to the Nitrox mode, the correct oxygen percentage
of the gas in your cylinder must always be entered into
the computer to ensure correct nitrogen and oxygen
calculations. Also, in Nitrox mode, the oxygen partial
pressure limit must be set. When in the Nitrox Setting
mode the equivalent allowed maximum depth based on
the chosen setting will also be displayed.
To enter the Nitrox/Oxygen Setting Mode select MODE3 SET- 1 SET DIVE- 4 NITROX. The default oxygen
percentage (O2%) setting is 21% (air) and oxygen partial
pressure (PO2) setting 1.4 bar (Fig. 4.27.).
Fig. 4.27. Setting Oxygen Percentage and Partial Pressure. The equivalent
maximum depth is displayed as 32.8 m [107 ft]. Press scroll buttons to change
oxygen percentage and to set oxygen partial setting value.
50
4.3.2. SETTING TIME [2 SET TIME]
To enter the Time Setting Mode select MODE- 3 SET- 2
SET TIME. The Time Setting mode has three options:
1 Time, 2 Date and 3 Daily Time Alarm.
OK
4.3.2.1. ADJUSTING TIME [1 ADJ TIME]
To enter the Time Setting Mode select MODE- 3 SET- 2
SET TIME- 1 AdJ TIME. After entering this mode you
are able to select between 12 h and 24 hour time formats
and set the correct time by using the SMART (MODE)
and scroll buttons (Fig. 4.28.).
Fig. 4.28. Adjusting Time.
4.3.2.2. ADJUSTING DATE [2 ADJ DATE]
To enter the Date Setting Mode select MODE- 3 SET- 2
SET TIME- 2 AdJ DATE. After entering this mode you
are able to set the correct year, month and day in this
order (Fig. 4.29.).
NOTE! The day of the week is automatically
calculated in accordance with the date. The date
can be set within the range of Jan 1, 1990 to Dec.
31, 2089.
4.3.2.3. ADJUSTING DAILY ALARM
[3 T ALARM]
OK
Fig. 4.29. Adjusting Date.
You can set one daily alarm in the dive computer. When
the daily alarm activates, the time symbol blinks for 1
minute and the alarm sounds for 24 seconds. The alarm
is given at the preset time each day. Press any button to
stop the audible alarm, after it has activated.
To enter the Daily Alarm Setting Mode to adjust the
alarm select MODE- 3 SET- 2 SET TIME- 3 T ALARM.
After entering this mode you are able to set the desired
alarm time (Fig. 4.30.).
OK
Fig. 4.30. Adjusting Daily
Alarm.
51
4.3.3. SETTING PREFERENCES
[3 SET PREF]
To enter the Setting Preferences Mode select MODE- 3
SET- 3 SET PREF. The Setting Preferences mode has
three options: 1 Light, 2 Units and 3 Model.
OK
TIME
4.3.3.1. BACKLIGHT SETTING [1 LIGHT]
In the Backlight Setting mode the backlight can be
turned off or on and the on time can be set to be 5 to
30 seconds (Fig. 4.31.).
Fig. 4.31. Setting Backlight On
Time. Press scroll buttons to
change backlight on/off and to
set time value.
To enter the Backlight Setting Mode select MODE- 3
SET- 3 SET PREF- 1 LIGHT.
NOTE! When the backlight turned OFF, it does not
illuminate when an alarm is given.
m
ft
4.3.3.2. DIVE COMPUTER UNITS SETTING
[2 UNITS]
OK
°C
°F
Fig. 4.32. Setting Metric/Imperial units.
To enter the Dive Computer Units Setting mode, select
MODE- 3 SET- 3 SET PREF- 2 UNITS. This will
enable you to choose between metric and imperial
units (Fig. 4.32.).
4.3.3.3. DIVE COMPUTER MODEL
SETTING [3 MODEL] - AIR/NITROX/
GAUGE
In the Dive Computer Model Setting mode the dive
computer can be set to be an AIR computer, NITROX
computer or a depth GAUGE with a timer (Fig.
4.33.).
To enter the Dive Computer Model Setting mode select
MODE- 3 SET- 3 SET PREF- 3 MODEL.
OK
Fig. 4.33. Setting Dive Computer model.
52
5. CARE AND MAINTENANCE
This Suunto dive computer is a sophisticated precision instrument. Though designed
to withstand the rigors of scuba diving, you must treat it with proper care and
caution as any other precision instrument.
5.1. IMPORTANT INFORMATION
DEPTH SENSOR
The built-in depth sensor is a sophisticated precision component. Keep the area
around the depth sensor clear from dirt, sand, dust or other substances. Rinse the
device thoroughly with fresh water and dry it with a soft towel. Never use pins,
needles or other objects to clean the depth sensor (Fig. 2.3.).
WATER CONTACTS AND PUSH BUTTONS
Contamination or dirt on the water contacts/connector or push buttons may prevent
the automatic activation of the Dive Mode and cause problems during data transfer.
Therefore, it is important that the water contacts and push buttons are kept clean.
If the water contacts are active (AC-text remains on display) or the Dive Mode
activates on its own, there is probably contamination or invisible marine growth
that may create an unwanted electric current between the contacts. It is important
that the dive computer is carefully washed in fresh water after the day’s diving
is completed. The contacts can be cleaned with fresh water and, if necessary, a
mild detergent and a soft brush. Sometimes it might be necessary to remove the
instrument from the protective boot for cleaning.
53
5.2. CARE OF YOUR DIVE COMPUTER
•
•
•
•
•
•
•
•
•
54
NEVER try to open the case of the dive computer.
Service your dive computer every two years or after 200 dives (whichever
comes first) by an authorized dealer or distributor. This service will include
a general operational check, replacement of the battery, and water resistance
check. The service requires special tools and training. Therefore, it is
advisable to contact an authorized Suunto dealer or distributor for biennial
service. Do not attempt to do any service that you are not sure about how to
do.
Should moisture appear inside the case or battery compartment, have the
instrument checked immediately by your Suunto dealer or distributor.
Should you detect scratches, cracks or other such flaws on the display that
may impair its durability, have it replaced immediately by your Suunto
dealer or distributor.
Wash and rinse the unit in fresh water after every use.
Protect the unit from shock, extreme heat, direct sunlight, and chemical
attack. The dive computer cannot withstand the impact of heavy objects
like scuba cylinders, nor chemicals like gasoline, cleaning solvents, aerosol
sprays, adhesive agents, paint, acetone, alcohol etc. Chemical reactions with
such agents will damage seals, case and finish.
Store your dive computer in a dry place when you are not using it.
The dive computer will display a battery symbol as a warning when the
power gets too low. When this happens, the instrument should not be used
until the battery has been replaced (see also section 3.1.1. “Activation and
Prechecks”).
Periodically check the hose for cracks or other signs of deterioration.
Replace hose if any damage is found.
5.3. MAINTENANCE
The instrument should be thoroughly rinsed with fresh water, then dried with a
soft towel after each dive. Make sure that all salt crystals and sand particles have
been flushed out.
Check the display and the transparent battery compartment cover for possible
moisture or water. DO NOT use the dive computer, if you detect any moisture or
water inside.
CAUTION!
- Do not use compressed air to blow water off the unit.
- Do not use solvents or other cleaning fluids that might cause damage.
- Do not test or use the dive computer in pressurized air.
5.4. WATER RESISTANCE INSPECTION
Ensure the water resistance of the device. Always check the water resistance of
the battery compartment when replacing the battery. Moisture inside the device
or battery compartment will seriously damage the unit.
Check the transparent battery compartment cover and the display for any sign of
leaks. If you find moisture inside your dive computer, there is a leak. A leak must
be corrected without delay, as moisture will seriously damage the unit, even beyond
repair. Suunto does not take any responsibility for damage caused by moisture in
the dive computer, if the instructions of this manual are not carefully followed.
In case of a leak, immediately take the dive computer to an authorized Suunto
dealer or distributor. Only an authorized Suunto dealer or distributor should do
service activities.
5.5. BATTERY REPLACEMENT
NOTE! It is imperative that the change is made in a proper manner to avoid any
leakage of water into the battery compartment or computer. When in doubt, it is
advisable to contact an authorized Suunto dealer for battery replacement.
NOTE! When the battery is changed, all nitrogen and oxygen uptake data is lost.
Therefore, before changing the battery, the no-flying time shown by the computer
should have reached zero. Otherwise, wait for 48 hours or preferably even 100
hours before you dive again.
55
CAUTION!
Defects caused by improper battery installation are not covered by the
warranty.
All history and profile data, as well as the altitude, personal and alarm settings,
will remain in the dive computer memory after the battery change. However, the
clock time and time alarm setting is lost. In the Nitrox mode, the nitrox settings
revert back to default settings (21% O2, 1.4 bar PO2).
When working with the battery compartment, cleanliness is extremely important.
Even the smallest dirt particles may cause a leakage when you dive.
BATTERY KIT
The battery kit includes a 3.0 V coin type lithium cell battery and a lubricated Oring. When handling the battery do not make contact with both of the poles at the
same time. Do not touch the surfaces of the battery with your bare fingers.
TOOLS REQUIRED
•
•
•
A Philips screwdriver.
Soft cloth for cleaning.
Needlenose pliers or small screwdriver for turning securing ring.
BATTERY REPLACEMENT
The battery and the buzzer are located in the back of the instrument in a separate
compartment. Console and battery compartment parts are shown in Fig. 5.1. and
Fig. 5.2. To change the battery, follow the procedure below:
1. Unscrew the four screws at the back of the elastomer console and remove
the back cover of the console.
2. Thoroughly rinse and dry the computer.
3. Open the securing ring of the battery compartment lid by pushing it down
and rotating it clockwise. You may use a pointed nose pliers or a small
screwdriver as an aid to rotate. Put the pliers ends into the holes of the
securing ring or the screwdriver onto the side of the right tooth on the ring
(Fig. 5.3.) and turn the ring clockwise. Care should be taken not to damage
any of the parts.
4. Remove the ring.
56
5. Carefully remove the lid with the beeper attached to it. The lid can be
removed by pressing with your finger on the outermost edge of the lid
while at the same time pulling with your nail at the opposite side. Do not
use sharp metal objects as they might damage the O-ring or the sealing
surfaces.
6. Remove the O-ring and the battery retainer.
7. Carefully remove the battery. Do not damage the electrical contacts or the
sealing surface.
Check for any traces of flooding, particularly between the beeper and the lid, or for
any other damage. In case of a leak or any other damage, bring the dive computer
to an authorized Suunto dealer or distributor for check and repair.
8. Check the condition of the O-ring; a defective O-ring may indicate sealing
or other problems. Dispose the old O-ring, even if it seems to be in good
condition.
9. Check that the battery compartment, battery holder and lid are clean. Clean
with soft cloth if necessary.
10. Check the polarity of the battery: the “-” mark should point toward the
bottom of the compartment and the “+” mark upwards. Gently insert the
new battery in the battery compartment
11. Reinstall the battery retainer in its correct position.
12. Check that the new lubricated O-ring is in good condition. Put it in the right
position in the battery compartment. Be very careful not to get any dirt on
the O-ring or its sealing surfaces.
13. Carefully press the lid onto the battery compartment with your thumb,
while making sure that the O-ring is not at any point protruding out at the
edge.
14. Put your other thumb through the locking ring. Press this thumb firmly
against the lid and release the other one. Make sure that the lid is pressed
completely down!
15. Note the correct orientation of the locking ring. Turn the locking
ring counterclockwise with your free thumb and fingers until it snaps into
its locked position.
57
16. The dive computer should now activate it’s timekeeping mode and show
time 18:00 [6:00 PM] and date SA 01,01. Activate the instrument. Check
that:
•
•
•
•
All display segments work.
The low battery warning is off.
The buzzer beeps and backlight works.
All the settings are correct. Reset current time, date and other settings, if
necessary.
17. Reassemble computer into the console. The instrument is now ready for
use.
CAUTION!
Check after the first dives for possible moisture under the transparent battery
compartment lid, indicating a leak.
Cobra console,
end piece
K5606
Cobra display
shield V5850
CB-71 with
SK-7 compass
5517
Securing Ring
V5844
Cobra case
Battery
Compartment Lid
with buzzer
V5843
Console screw
(3,5 x 16mm)
K5609
O-Ring
K5664
Battery
Retainer
V5842
Cobra console,
front K5607
Cobra console,
back K5608
Fig. 5.1. Console parts. The code after the name stands for
spare part order number.
58
Battery
K5597
Fig. 5.2. Battery compartment parts. The code
after the name stands for
spare part order number.
5.6. DISPLAY SHIELD REPLACEMENT
Unscrew the four screws at the back of the console and remove the back cover.
Remove the computer and the display shield. Install new display shield and reinstall
computer and console back.
5.7. COMPASS ATTACHMENT
Unscrew the four screws at the back of the console and remove the back cover.
Replace the console end part with compass. Reassemble console.
Fig. 5.3. Opening of securing ring.
59
6. TECHNICAL DESCRIPTION
6.1. OPERATING PRINCIPLES
NO-DECOMPRESSION LIMITS
The no-decompression limits displayed by the dive computer for the first dive to
a single depth (see Table 6.1. and Table 6.2.), are slightly more conservative than
those permitted by the U.S. Navy tables.
TABLE 6.1. NO-DECOMPRESSION TIME LIMITS (MIN) FOR
VARIOUS DEPTHS (M) FOR THE FIRST DIVE OF A SERIES
Personal Mode / Altitude Mode
Depth
[m]
P0/A0
9
12
15
18
21
24
27
30
33
36
39
42
45
-124
72
52
37
29
23
18
13
11
9
7
6
P0/A1 P0/A2
163
89
57
39
29
24
18
14
11
9
8
6
5
130
67
43
30
23
19
15
12
9
8
6
5
5
P1/A0 P1/A1
163
89
57
39
29
24
18
14
11
9
7
6
5
130
67
43
30
23
19
15
12
9
8
6
5
5
P1/A2 P2/A0
96
54
35
25
20
16
12
9
8
6
5
4
4
130
67
43
30
23
19
15
12
9
8
6
5
5
P2/A1
P2/A2
96
54
35
25
20
16
12
9
8
6
5
4
4
75
45
29
21
15
12
9
7
6
5
4
4
3
TABLE 6.2. NO-DECOMPRESSION TIME LIMITS (MIN) FOR
VARIOUS DEPTHS [FT] FOR THE FIRST DIVE OF A SERIES
60
Personal Mode / Altitude Mode
Depth
[ft]
P0/A0
30
40
50
60
70
80
90
100
110
120
130
140
150
-120
69
50
36
28
22
17
13
10
9
7
6
P0/A1 P0/A2
160
86
56
38
29
23
18
14
11
9
7
6
5
127
65
41
29
23
19
15
11
9
8
6
5
4
P1/A0 P1/A1
160
86
56
38
29
23
18
14
11
9
7
6
5
127
65
41
29
23
19
15
11
9
8
6
5
4
P1/A2 P2/A0
93
53
34
25
20
15
11
9
7
6
5
4
4
127
65
41
29
23
19
15
11
9
8
6
5
4
P2/A1
P2/A2
93
53
34
25
20
15
11
9
7
6
5
4
4
73
43
28
20
15
11
9
7
6
5
4
4
3
ALTITUDE DIVING
The atmospheric pressure is lower at high altitudes than at sea level. After traveling
to a higher altitude, the diver will have additional nitrogen in his body, compared
to the equilibrium situation at the original altitude. This “additional” nitrogen is
released gradually in time and equilibrium is reached. It is recommended that
you acclimate to the new altitude by waiting at least three hours before making
a dive.
Before high altitude diving, the instrument must be set to the Altitude Adjustment
mode to adjust the calculations for the new altitude. The maximum partial pressures
of nitrogen allowed by the mathematical model of the dive computer are reduced
according to the lower ambient pressure.
As a result, the allowed no-decompression stop limits are considerably reduced.
SURFACE INTERVALS
The dive computer requires a minimum surface interval of 5 minutes between
dives. If a surface interval is shorter than 5 minutes, the next dive is treated as a
continuation of the previous dive.
61
6.2. REDUCED GRADIENT BUBBLE MODEL,
SUUNTO RGBM
The Suunto Reduced Gradient Bubble Model (RGBM) is a modern algorithm for
predicting both dissolved and free gas in the tissues and blood of divers. It was
developed in a co-operation between Suunto and Bruce R. Wienke BSc, MSc.
PhD. It is based on both laboratory experiments and diving data, including data
from DAN.
It is a significant advance on the classical Haldane models, which do not predict free
gas (microbubbles). The advantage of Suunto RGBM is additional safety through its
ability to adapt to a wide variety of situations. Suunto RGBM addresses a number
of diving circumstances outside the range of just dissolved gas models by:
•
•
•
•
•
Monitoring continuous multiday diving
Computing closely spaced repetitive diving
Reacting to a dive deeper than the previous dive
Adapting for rapid ascents which produce high micro-bubble (silentbubble) build-up
Incorporating consistency with real physical laws for gas kinetics.
SUUNTO RGBM ADAPTIVE DECOMPRESSION
The SUUNTO RGBM algorithm adapts its predictions of both the effects of microbubble build-up and adverse dive profiles in the current dive series. It will also
change these calculations according to the personal adjustment you select.
The pattern and speed of decompression at the surface is adjusted according to
micro-bubble influence.
Also on repetitive dives adjustment may be applied to the maximum allowable
nitrogen overpressure in each theoretical tissue group.
Depending on circumstances Suunto RGBM will adapt the decompression
obligations by doing any or all of the following:
•
•
•
•
62
Reducing no-decompression stop dive times
Adding Mandatory Safety Stops
Increasing decompression stop times
Advising an extended surface interval (Diver Attention symbol).
DIVER ATTENTION SYMBOL - ADVICE TO EXTEND
SURFACE INTERVAL
Some patterns of diving cumulatively add a higher risk of DCI, e.g. dives with
short surface intervals, repetitive dives deeper than earlier ones, multiple ascents,
substantial multiday diving. When this is detected in addition to adapting the
decompression algorithm Suunto RGBM will in some circumstances also advise,
with the Diver Attention Symbol (review page 33) that the diver extend the surface
interval
6.3. OXYGEN EXPOSURE
The oxygen exposure calculations are based on currently accepted exposure time
limit tables and principles. In addition to this the dive computer uses several methods
to conservatively estimate the oxygen exposure. These include for example:
•
the displayed oxygen exposure calculations are rounded to the next
higher whole percentage value
• for recreational scuba diving, the recommended upper limit of 1.4 bar
PO2 is used as a default
• the CNS% limits up to 1.4 bar are based on 1991 NOAA Diving Manual
limits, but the limits higher than 1.4 bar are significantly shortened
• the OTU monitoring is based on the long-term daily tolerance level and
the recovery rate is reduced.
Oxygen related information displayed by the dive computer is also designed to
ensure all warnings and displays in the appropriate phases of a dive. E.g. the
following information will be shown before and during a dive, when the computer
is set in Nitrox mode:
•
•
•
•
•
•
the selected O2%
the color-coded OLF% bar graph for either CNS% or OTU%
audible alarms are given and the OLF bar graph starts to blink when the
80% and 100% limits are exceeded
the blinking of the bar graph stops, when the PO2 is below 0.5 bar
audible alarms are given and the actual PO2 value blinks when it exceeds
the preset limit
in dive planning the maximum depth according to the O2% and
maximum PO2 selected.
63
6.4. TECHNICAL SPECIFICATION
Dimensions and weight:
• Diameter: width 73mm [2.85in], length 165mm [6.50in].
• Thickness: 35mm [1.40in].
• Weight: 210g without hose [7.4 oz].
Depth Gauge:
•
•
Temperature compensated pressure sensor.
Salt water calibrated, in fresh water the readings are about 3% smaller
(calibrated complying with prEN 13319).
• Maximum depth of operation: 80 m [262 ft] (complying with prEN
13319).
• Accuracy: ± 1% of full scale or better from 0 to 80 m [262 ft] at 20°C
[68°F] (complying with prEN 13319).
• Depth display range: 0 … 150 m [492 ft].
• Resolution: 0.1 m from 0 to 100 m [1 ft from 0 to 328 ft].
Cylinder Pressure Gauge
•
Rated working pressure: 300 bar [4000 psi], maximum allowed pressure
360 bar [5000 psi].
• Resolution: 1 bar [10 psi].
Temperature display:
•
•
•
Resolution: 1°C [1.5°F].
Display range: -9 ... +50°C [-9 ... +122°F].
Accuracy: ± 2°C [± 3.6°F] within 20 minutes of temperature change.
Calendar Clock:
• Accuracy: ± 25 s/month (at 20°C [68°F]).
• 12/24 h display.
Other displays:
•
•
•
•
•
•
•
64
Dive time: 0 to 999 min, counting starts and stops at 1.2 m [4 ft] depth.
Surface time: 0 to 99 h 59 min.
Dive counter: 0 to 99 for repetitive dives.
No-decompression time: 0 to 199 min (- - after 199).
Ascent time: 0 to 99 min (- - after 99).
Ceiling depths: 3.0 to 100 m [10 to 328 ft].
Air time: 0 to 99 min (- - after 99).
Displays only in Nitrox mode:
•
•
Oxygen%: 21 - 50.
Oxygen partial pressure display: 1.2 - 1.6 bar depending on the limit
setting.
• Oxygen Limit Fraction: 1 - 110% with 10% resolution (bar graph).
Logbook/Dive Profile Memory:
•
Recording interval: 20 seconds (the recording interval can be set to 10s,
30s or 60s with the optional PC-interface unit and software), records the
maximum depth of each interval.
• Memory capacity: approximately 36 hours of diving with 20 seconds
recording interval.
• Depth accuracy: 0.3 m [1 ft].
Operating Conditions
•
•
•
Normal altitude range: 0 to 3000 m [10000 ft] above sea level.
Operating temperature: 0°C to 40°C [32°F to 104°F].
Storage temperature: -20°C to +50°C [-4°F to +122°F].
It is recommended that the instrument be stored in a dry place at room
temperature.
NOTE! Do not leave the dive computer in direct sunlight!
Tissue Calculation Model
•
•
•
•
•
Suunto RGBM algorithm (developed by SUUNTO and Bruce R.
Wienke, BS, MS and PhD).
9 tissue compartments.
Tissue compartment halftimes: 2.5, 5, 10, 20, 40, 80, 120, 240 and 480
minutes (on gassing). The off gassing halftimes are slowed down.
Reduced gradient (variable) “M” values based on diving habit and dive
violations. The “M” values are tracked up to 100 hours after a dive.
The EAN and oxygen exposure calculations are based on
recommendations by R.W. Hamilton, PhD and currently accepted
exposure time limit tables and principles.
65
Battery
•
One 3 V lithium battery: CR 2450 (K5597) and O-ring 1,78 mm x 31,47
mm 70 ShA (K5664).
• Battery storage time (shelf life): Up to three years.
• Replacement: Every two years or more often depending on dive activity.
• Life expectancy at 20°C [68°F]:
- 0 dives/y
-> 3 years
- 100 dives/y
-> 2 years
- 400 dives/y
-> 1 year
The following conditions have an affect on the expected battery lifetime:
• The length of the dives.
• The condition in which the unit is operated and stored (e.g. temperature/
cold conditions). Below 10°C [50°F] the expected battery lifetime is
about 50-75% of that at 20°C [68°F].
• The use of the backlight and audible alarms.
• The quality of the battery (some lithium batteries may exhaust
unexpectedly, which cannot be tested in advance).
• The time the dive computer has been stored until it gets to the customer.
The battery is installed into the unit at the factory.
NOTE! Low temperature or an internal oxidation of the battery may cause the
battery warning even though the battery has enough capacity. In this case, the
warning usually disappears when the Dive Mode is activated again.
66
7. WARRANTY
NOTE! The warranty arrangements are different in different countries. The dive
computer packaging contains information regarding the warranty benefits and
requirements applicable to your purchase.
This Suunto dive computer is warranted against defects in workmanship and
materials for a period of two years after purchase to the original owner subject to
and in accordance with the terms and conditions set forth below:
The dive computer should be serviced or repaired only by an authorized Suunto
dealer or distributor.
This warranty does not cover damage to the product resulting from improper
usage, improper maintenance, neglect of care, alteration or unauthorized repair.
This warranty will automatically become void if proper preventive maintenance
procedures have not been followed as outlined in the use and care instructions for
this product.
If a claim under this or any other warranty appears to be necessary, return
the product, freight prepaid, to your Suunto dealer or distributor or qualified
repair facility. Include your name and address, proof of purchase and/or service
registration card, as required in your country. The claim will be honored and the
product repaired or replaced at no charge and returned in what your Suunto dealer
or distributor determines a reasonable amount of time, provided all necessary
parts are in stock. All repairs made, not covered under the terms of this warranty,
will be made at the owner’s expense. This warranty is non-transferable from the
original owner.
All implied warranties, including but not limited to the implied warranties of
merchantability and fitness for a particular purpose, are limited from date of
purchase and in scope to the warranties expressed herein. Suunto shall not be
liable for loss of use of the product or other incidental or consequential costs,
expenses or damage incurred by the purchase. All warranties not stated herein are
expressly disclaimed.
Some states do not allow the exclusion or limitation of implied warranties of
consequential damages, so the above exclusions or limitations may not apply to
you. This warranty gives you specific legal rights, and you may also have other
rights that vary from state to state.
This warranty does not cover any representation or warranty made by dealers or
representatives beyond the provisions of this warranty. No dealer or representation
is authorized to make any modifications to this warranty or to make any additional
warranty.
Battery replacement is not covered by this warranty.
This Instruction Manual should be kept with your dive computer.
67
8. GLOSSARY
Air Time
The amount of dive time remaining, based on a calculation
of cylinder pressure and ambient pressure and present air
consumption.
Altitude dive
A dive made at an elevation greater than 300 m [1000 ft] above
sea level.
Ascent rate
The speed at which the diver ascends toward the surface.
ASC RATE
Abbreviation for ascent rate.
Ascent time
The minimum amount of time needed to reach the surface on
a decompression stop dive.
ASC TIME
Abbreviation for ascent time.
Ceiling
On a decompression stop dive the shallowest depth to which a
diver may ascend based on computer nitrogen load.
Ceiling Zone
On a decompression stop dive the zone between the ceiling and
the ceiling plus 1.8 m [6 ft]. This depth range is displayed with
the two arrows pointing toward each other (the “hour glass”
icon).
CNS
Abbreviation for Central Nervous System toxicity.
Central Nervous System Toxicity
Toxicity caused by oxygen. Can cause a variety of neurological
symptoms. The most important of which is an epileptic-like
convulsion which can cause a diver to drown.
CNS%
Central Nervous System toxicity limit fraction. Also note
Oxygen Limit Fraction
Compartment
See “Tissue group”.
DAN
Divers Alert Network.
DCI
Abbreviation for decompression illness.
Decompression
Time spent at a decompression stop or range before surfacing,
to allow absorbed nitrogen to escape naturally from tissues.
Decompression range On a decompression stop dive the depth range, between the floor
and ceiling, within which a diver must stop for some time
during ascent.
Decompression illness
Any of a variety of maladies resulting either directly or indirectly
from the formation of nitrogen bubbles in tissues or body
fluids, as a result of inadequately controlled decompression.
Commonly called “bends” or “DCI”.
68
Dive series
A group of repetitive dives between which the dive computer
indicates some nitrogen loading is present. When nitrogen
loading reaches zero the dive computer deactivates.
Dive time
Elapsed time between leaving the surface to descend, and
returning to the surface at the end of a dive.
∆P
Delta P, describing the Cylinder Pressure drop during the
dive; difference in tank pressure between beginning and end
of dive.
EAD
Abbreviation for equivalent air depth.
EAN
Abbreviation for enriched air nitrox.
Enriched Air Nitrox Also called Nitrox or Enriched Air = EANx. Air that has some
oxygen added. Standard mixes are EAN32 (NOAA Nitrox I =
NN I) and EAN36 (NOAA Nitrox II = NN II).
Equivalent Air Depth Nitrogen partial pressure equivalent table.
Floor
The deepest depth during a decompression stop dive at which
decompression takes place.
Half-time
After a change in ambient pressure, the amount of time required
for the partial pressure of nitrogen in a theoretical compartment
to go half-way from its previous value to saturation at the new
ambient pressure.
HP
Abbreviation for high pressure (= cylinder pressure).
Multi-level dive
A single or repetitive dive that includes time spent at various
depths and whose no-decompression limits are therefore not
determined solely by the maximum depth attained.
NITROX
In sports diving refers to any mix with a higher fraction of
oxygen than standard air.
NOAA
United States National Oceanic and Atmospheric
Administration.
No-decompression time
The maximum amount of time a diver may remain at a particular
depth without having to make decompression stops during the
subsequent ascent.
No-decompression dive
Any dive which permits a direct, uninterrupted ascent to the
surface at any time.
NO DEC TIME
Abbreviation for no-decompression time limit.
OEA = EAN = EANx Abbreviation for Oxygen Enriched Air Nitrox.
OLF
Abbreviation for Oxygen Limit Fraction.
69
Oxygen Tolerance Unit
Is used to measure the Whole-Body-Toxicity.
Oxygen Limit Fraction
A term used by SUUNTO for the values displayed in the
Oxygen Toxicity bargraph. The value is either the CNS% or
the OTU%.
O2%
Oxygen percentage or oxygen fraction in the breathing gas.
Standard air has 21% oxygen.
Oxygen partial pressure
Limits the maximum depth to which the used Nitrox mixture
can safely be used. The maximum partial pressure limit for
enriched air diving is 1.4 bar. The contingency partial pressure
limit is 1.6 bar. Dives beyond this limit have the risk for
immediate oxygen toxicity.
PO2
Abbreviation for oxygen partial pressure.
RGBM
Abbreviation for Reduced Gradient Bubble Model.
Reduced Gradient Bubble Model
Modern algorithm for tracking both dissolved and free gas in
divers.
Repetitive dive
Any dive whose decompression time limits are affected by
residual nitrogen absorbed during previous dives.
Residual nitrogen
The amount of excess nitrogen remaining in a diver after one
or more dives.
SURF TIME
Abbreviation for surface interval time.
Surface interval time Elapsed time between surfacing from a dive and beginning a
descent for the subsequent repetitive dive.
Tissue group
Theoretical concept used to model bodily tissues for the
construction of decompression tables or calculations.
Whole-Body Toxicity Another form of oxygen toxicity, which is caused by prolonged
exposure to high oxygen partial pressures. The most common
symptoms are irritation in the lungs, a burning sensation in the
chest, coughing and reduction of the vital capacity. Also called
Pulmonary Oxygen Toxicity. See also OTU.
70
71
DISPOSAL OF THE DEVICE
Please dispose of the device in an appropriate way, treating it
as electronic waste. Do not throw it in the garbage. If you wish,
you may return the device to your nearest Suunto dealer.
Printed in Finland 01.2006 / Esa Print Oy / 160094
72
AIR
NITROX
GAUGE
OK
3 MODEL
SELECT
QUIT
SELECT
2 SET
TIME
OK
METRIC
IMPERIAL
SELECT
2 UNITS
QUIT
OK
backlight
on time
SELECT
1 LIGHT
SELECT
1 SET
DIVE
SELECT
LCD &
battery
check
nitrox /
gauge
display
OK
OK
SELECT
2 SIMUL
QUIT
3 MODE OPTIONS
OK
QUIT
OK
minutes
on / off
hours
OK
OK
SELECT
day
OK
month
year
2 Adj DATE
QUIT
QUIT
dive simulation:
surface mode
ascend
OK
OK
SELECT
min
hours
OK
24h / AM / PM
descend
simulate diving
SELECT
C
B
T
bar
AIR TIME
OK
SELECT
O2%
OK
PO2
QUIT
QUIT
page 4
profile
on / off
QUIT
alarm depth
SELECT
3 MAX DPTH
OK
QUIT
OK
on / off
OK
OK
OK
Personal
P0, P1, P2
Altitude
A0, A1, A2
1 Adj MODE
SELECT
DT minutes
SELECT
2 d ALARM
Dive n-1
page 1
Dive n-2
page 1
Dive n
page 1
QUIT
END
QUIT
SELECT
QUIT
page 2
page 3
Dive n
page 1
SELECT
1 LOGBOOK
3 / 4 SET DIVE OPTIONS
history
SELECT
2 HISTORY
4 NITROX
data
transfer
SELECT
Backlight
MODES AND
OPERATIONS
Time & Alternative Display(s)
DIVE TIME
NO DEC TIME
MAX
3 MEMORY OPTIONS
3 TR - PC
SELECT
m
DIVING MODE
Bookmark in
the profile memory
1 MEMORY
1 SIMDIVE
1 Adj TIME
3 SET TIME OPTIONS
QUIT
decrease depth
OK
Add surface
interval minutes
SIMulate PLANning
3 T ALARM
MODE
2 SIMULation OPTIONS
increase depth
SELECT
DIVE TIME
Backlight (>2 s)
DIVE MODE
1.2 M
Plan Time & Alternative Display(s)
Add surface
interval hours
2 SIMPLAN
SELECT
3 SET
QUIT
bar
m
SURFACE MODE
MENU BASED
SUBMODE 1
2 / 3 SET PREF OPTIONS
SELECT
3 SET
PREFerences
3 SET OPTIONS
Activate the timekeeping display
ON
TIME-KEEPING AND STAND-BY MODE
MENU BASED
MAIN MODE
MENU BASED
SUBMODE 2
COPYRIGHT
This publication and its contents are proprietary to Suunto Oy.
Suunto, Wristop Computer, Suunto Cobra, Replacing Luck and their logos
are registered or unregistered trademarks of Suunto Oy. All rights reserved.
While we have taken great care to ensure that information contained
in this documentation is both comprehensive and accurate,
no warranty of accuracy is expressed or implied.
Its content is subject to change at any time without notice.
Printed in Finland 01.2006 / Esa Print Oy / 160094
www.suunto.com
Made in Finland
© Suunto Oy 02 / 2004, 01 / 2006
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